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If I(we,you,he,they)+ had + è¿å»åè¯ I(we)should + have+ è¿å»åè¯ãHe (you,they) would + have + è¿å»åè¯ã
If I were you, I should buy it.
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If I had time, I would study French.
å¦ææææ¶é´ï¼æä¼å¦ä¹ æ³è¯çã
If she knew English,she would not ask me for help.
å¦æ她æè±è¯çè¯ï¼å¥¹ä¸ä¼æ¾æ帮å¿çã
If you had got up earlier, you could have caught the train.
å¦æä½ æ©ä¸ç¹èµ·åºï¼å°±ä¼èµ¶ä¸ç«è½¦çã
If it were fine tomorrow,I would go shopping.
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æå ³èæè¯æ°çå 个é®é¢ï¼
1) ææ¶ifå¼å¯¼çç¶è¯ä»å¥å¯ä»¥çç¥ ifï¼èæä»å¥ä¸çå¨è¯ were, had æ should 移å°ä¸»è¯åé¢ã
Were she younger, she would do it .
å¦æ她年éç¹ï¼ 她就ä¼å¹²çã
Had he known her address, he would had gone to visite her.
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2) ææ¶è¡¨ç¤ºèæè¯æ°çæ¡ä»¶ä»å¥æè 主å¥é½å¯ä»¥çç¥ï¼èåªå©ä¸ä¸ä¸ªä¸»å¥æè ä¸ä¸ªæ¡ä»¶ä»å¥ã
I could help you.
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If I had time.
æè¦ææ¶é´è¯¥å¤å¥½åã
She should have come to the party.
她åºè¯¥æ¥åå èä¼ã
If he had much more money.
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3) èæè¯æ°ä¸ï¼æ¡ä»¶ä»å¥çå¨è¯å¨ä½å¯ä»¥å主å¥çå¨è¯å¨ä½æ¶æä¸ä¸è´ã
If they had studied hard, they could do it easily now.
å¦æä»ä»¬ä»¥ååªåå¦ä¹ çè¯ï¼ç°å¨å¹²çå°±ä¼å®¹æäºã
If he had not taken my advice, he wouldn't do it much better like this.
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èæè¯æ°(Subjunctive Mood)è¿ä¸è¯æ³é¡¹ç®æ¯åç±»è±è¯èè¯ä¸å¿æµè¯çéç¹ä¹ä¸ãèæè¯æ°æ¯ä¸ç§ç¹æ®çå¨è¯å½¢å¼ï¼ç¨æ¥è¡¨ç¤ºè¯´è¯äººæ说çè¯å¹¶ä¸æ¯äºå®ï¼èæ¯ä¸ç§å设ãæ¿æãæçææ¨æµã
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â èæç°å¨æ¶è¡¨ç¤ºä¸ç°å¨äºå®ç¸åçå设ï¼å ¶if ä»å¥çè°è¯å½¢å¼ç¨å¨è¯çè¿å»å¼(be ä¸è¬ç¨were)ï¼ä¸»å¥ç¨would/ should/ could/ might +å¨è¯åå½¢ï¼ä¾å¦ï¼If I were in your position I would marry her.
â¡ èæè¿å»æ¶æ¯è¡¨ç¤ºä¸è¿å»äºå®ç¸åçå设ï¼if ä»å¥çè°è¯å½¢å¼ç¨è¿å»å®ææ¶å³hadï¼è¿å»åè¯ï¼ä¸»å¥ç¨would / should / could / might + have +è¿å»åè¯ï¼ä¾å¦ï¼If it had not rained so hard yesterday we could have played tennis.
⢠大å¤æ°çèææ¡ä»¶å¥å±äºä¸é¢ä¸ç§æ åµçä¸ç§ï¼ä½å¹¶ä¸æé¤åå¨æ¡ä»¶ååæä¸ï¼ä¸ä¸ªåç°å¨æ åµç¸åï¼å¦ä¸ä¸ªåè¿å»æ åµç¸åï¼ä¾å¦ï¼If you had followed what the doctor said, you would not have been so painful now.è¿ä¸ªå¥åå¨é«ä¸åºç°é¢çé¢é«ã
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â é¤äºè¡¨ç¤ºèåæ¡ä»¶å¤ï¼ifä»å¥è¿å¯ä»¥è¡¨ç¤ºå¯¹å°æ¥çæ¨æµï¼ç±äºæ¯å°æ¥è¿æ²¡æåççï¼æ以è°ä¸ä¸æ¯çå®çè¿æ¯èåçï¼åªè½è¯´è¿ä¸ªäºæ åççå¯è½æ§æå¤å¤§ãä¸è¬æ åµä¸ï¼å¯ä»¥ç¨éè¿°è¯æ°çifä»å¥æ¥è¡¨ç¤ºå¯¹ä¸ä¸ªæªæ¥äºå®çæ¨æµï¼è¿ä¸ªäºå®æ¯å®å ¨å¯è½åççãIfä»å¥çè°è¯å½¢å¼ç¨ä¸è¬è¿å»å¼æç¨were to / should +å¨è¯åå½¢ï¼ä¸»å¥ç¨would / should /could/ might +å¨è¯åå½¢ï¼ä¾å¦ï¼Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.ï¼1996å¹´1æå级第44é¢ï¼
â ææ¶å¯ä»¥æå«æå©å¨è¯ãæ æå¨è¯ãbeæhaveçèææ¡ä»¶å¥ä¸çè¿è¯if çå»ï¼èå°had , should, were çè¯æå°ä¸»è¯ä¹åï¼å³ç¨åè£ ç»æ,è¿æ¶åï¼å¦æåºç°notçå¦å®è¯ï¼å¦å®è¯éæ¾å¨ä¸»è¯åé¢ãè¿ç§ç»æå¨å£è¯ä¸å¾å°ä½¿ç¨ï¼ä½é¢é¢åºç°å¨åç±»èè¯ä¸åºç°ï¼ä¾å¦ï¼If it had not rained so hard yesterday we could have played tennis.âHad it not rained so hard yesterday, we could have played tennis.
â 大å¤æ°çèææ¡ä»¶éè¿ä¸é¢æ讲ç两ç§æ¹æ³è¡¨è¾¾ï¼ä½å¨ä¸ªå«å¥åä¸ä¹å¯ä»¥éè¿ä»è¯withoutåä»è¯çè¯but for表达ï¼å¯è¯otherwiseç表达åºæ¥ãä¾å¦ï¼We didn't know his telephone number; otherwise we would have telephoned him.ï¼1995å¹´6æå级第46é¢ï¼å¼å¾æ³¨æçæ¯ï¼å å«but forçå¥åï¼è°è¯å¨è¯å¿ å®è¦ç¨èæå½¢å¼ï¼ä½å å«withoutççè¯çå¥åï¼è°è¯å¨è¯æªå¿ ä¸å®è¦ç¨èæè¯æ°ã
â ææ¶èææ¡ä»¶ä¸æ¯æç¡®å°è¡¨è¾¾åºæ¥ï¼èå¨è´å«å¨ç¨butå¼å¯¼çä»å¥éï¼äºæ¯ä¾¿åºç°äºæè°è¯å¨è¯æ¯èæè¯æ°ç主å¥å ä¸è°è¯å¨è¯æ¯éè¿°è¯æ°çbutä»å¥ææç并åå¤åå¥ï¼ä¾å¦I would have hung you but the telephone was out of order.å¨è¿æ ·çå¥åéï¼å¦æ主å¥æ²¡æç¨èæè¯æ°ï¼æè ä»å¥ç¨äºèæè¯æ°ï¼é½æ¯éçã
â ¡ç¨å¨å®¾è¯ä»å¥ä¸çèæè¯æ°
â å¨è¡¨ç¤ºæ¿æçå¨è¯wishåç宾è¯ä»å¥ä¸ï¼éç¨èæè¯æ°ãï¼wishåçthat 常çç¥ï¼ï¼æ ¹æ®ä¸»å¥æ¶æï¼ä»å¥è°è¯æ¶æç¸åºéåä¸ä½ï¼ä¾å¦ï¼How she wished his family could go with him.
â å¨å ·ææ¿æã请æ±ã建议ãå½ä»¤ç主è§ææ¿çå¨è¯(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide â¦) åç宾è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨(should) +å¨è¯åå½¢ãå¼å¾æ³¨æçæ¯ï¼å¦æ宾è¯ä»å¥çå¨è¯æ¯å¦å®çï¼å¦å®è¯notçä½ç½®åºå¨å¨è¯ä¹åï¼èä¸æ¯å¨è¯ä¹åãä¾å¦ï¼The head nurse insisted that the patient not be move.å¦å¤ï¼å¦suggest表达âæ示âï¼insist表示âåææç§è¯´æ³âæ¶ï¼åé¢çä»å¥ä¸ç¨èæè¯æ°ï¼ä¾å¦ï¼Her pale face suggests that she is ill.æHe insisted that he did not kill the boy.
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â å¨It is+ä¸è¿°å¨è¯çè¿å»åè¯ï¼å ¶åæè·ç主è¯ä»å¥ä¸ï¼å¦It is suggested that pupils wear school uniforms.
â¡ å¨ä¸è¿°å¨è¯ç¸åºçåè¯å½¢å¼ä½ä¸»è¯+è¿ç³»å¨è¯ï¼å ¶åç表è¯ä»å¥ä¸ï¼ä¾å¦His suggestion was that classed be re-scheduled.
⢠å¨å¯¹ä¸è¿°å¨è¯ç¸åºçåè¯è¿è¡è§£éçåä½è¯ä»å¥ä¸ï¼å¦ï¼The workers raised the demand that their pay be increased to cope with the inflation.
â would ï¼hadï¼rather , would soonerä¹ç¨æ¥è¡¨è¾¾ä¸»è§æ¿æï¼å®ä»¬ä¹åç宾è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼è¡¨ç¤ºç°å¨æå°æ¥ï¼ç¨è¿å»å®æå¼è¡¨ç¤ºä¸è¿å»äºå®ç¸åï¼ä¾å¦ï¼I would rather he went right now.
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â it is +necessaryç形容è¯åï¼that主è¯ä»å¥ä¸èæå½¢å¼ä½¿ç¨ï¼è¿ç±»å½¢å®¹è¯å æ¬necessary, important, essential, imperative, urgent, preferable, vital, advisableçï¼ä¾å¦It is necessary that you listen to the teacher carefully.æè It is essential that you be able to pronounce every single word correctly.
â å¨It's (high/about) time ä¹åçå®è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼ï¼ä¾å¦It is high time that you went to school
â èæè¯æ°å¨as if / as though å¼å¯¼çæ¹å¼ç¶è¯ä»å¥ä¸çåºç¨ï¼è°è¯å¨è¯å½¢å¼ä¸wishåç宾è¯ä»å¥åºæ¬ç¸åï¼è¡¨ç¤ºä¸ç°å¨äºå®ç¸åæ对ç°å¨æ åµææçï¼è°è¯å¨è¯ç¨è¿å»å¼ãä¾å¦ï¼He felt as if he alone were responsible for what had happened. 表示è¿å»æ³è±¡ä¸çå¨ä½ææ åµï¼è°è¯å¨è¯ç¨è¿å»å®æå¼ã
â å¨lest å¼å¯¼çç¶è¯ä»å¥ä¸ï¼è°è¯å¨è¯å¤ç¨èæè¯æ°ï¼(should )+ å¨è¯åå½¢ãä¾å¦ï¼ The mad man was put in the soft-padded cell lest he injure himself.ï¼1998å¹´1æå级第38é¢ï¼
â å¨if only å¼èµ·çæå¹å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼æè¿å»å®æå¼ãä¾å¦ï¼ Look at the terrible situation I am in! if only I had followed your advice.
èæè¯æ°æå¤å°ç¨å¨è¡¨ç¤ºæ¡ä»¶çç¶è¯ä»å¥å表示ç»æç主å¥ä¸ãå¨è¡¨ç¤ºä¸äºå®ç¸åçèæè¯æ°æ¶ï¼å¨è¯æä¸ç§æ¶æå½¢å¼ï¼å³ç°å¨ï¼è¿å»åå°æ¥ã
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If I (we,you,he,they)+ å¨è¯è¿å»å¼.. if I (he,she) were... I (we) should + å¨è¯åå½¢ã He (you,they) would + å¨è¯åå½¢ã
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If I(we,you,he,they)+ had + è¿å»åè¯ I(we)should + have+ è¿å»åè¯ãHe (you,they) would + have + è¿å»åè¯ã
If I were you, I should buy it.
å¦æææ¯ä½ ï¼æ就买äºå®ã
If I had time, I would study French.
å¦ææææ¶é´ï¼æä¼å¦ä¹ æ³è¯çã
If she knew English,she would not ask me for help.
å¦æ她æè±è¯çè¯ï¼å¥¹ä¸ä¼æ¾æ帮å¿çã
If you had got up earlier, you could have caught the train.
å¦æä½ æ©ä¸ç¹èµ·åºï¼å°±ä¼èµ¶ä¸ç«è½¦çã
If it were fine tomorrow,I would go shopping.
å¦ææ天天æ°å¥½ï¼æå°±å»ä¹°ä¸è¥¿ã
æå ³èæè¯æ°çå 个é®é¢ï¼
1) ææ¶ifå¼å¯¼çç¶è¯ä»å¥å¯ä»¥çç¥ ifï¼èæä»å¥ä¸çå¨è¯ were, had æ should 移å°ä¸»è¯åé¢ã
Were she younger, she would do it .
å¦æ她年éç¹ï¼ 她就ä¼å¹²çã
Had he known her address, he would had gone to visite her.
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2) ææ¶è¡¨ç¤ºèæè¯æ°çæ¡ä»¶ä»å¥æè 主å¥é½å¯ä»¥çç¥ï¼èåªå©ä¸ä¸ä¸ªä¸»å¥æè ä¸ä¸ªæ¡ä»¶ä»å¥ã
I could help you.
ææ¬æ¥å¯ä»¥å¸®å©ä½ ã
If I had time.
æè¦ææ¶é´è¯¥å¤å¥½åã
She should have come to the party.
她åºè¯¥æ¥åå èä¼ã
If he had much more money.
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3) èæè¯æ°ä¸ï¼æ¡ä»¶ä»å¥çå¨è¯å¨ä½å¯ä»¥å主å¥çå¨è¯å¨ä½æ¶æä¸ä¸è´ã
If they had studied hard, they could do it easily now.
å¦æä»ä»¬ä»¥ååªåå¦ä¹ çè¯ï¼ç°å¨å¹²çå°±ä¼å®¹æäºã
If he had not taken my advice, he wouldn't do it much better like this.
å¦æä»ä¸å¬åæç建议ï¼ä»å°±ä¸ä¼å¹²å¾è¿æ ·å¥½èµå
èæè¯æ°(Subjunctive Mood)è¿ä¸è¯æ³é¡¹ç®æ¯åç±»è±è¯èè¯ä¸å¿æµè¯çéç¹ä¹ä¸ãèæè¯æ°æ¯ä¸ç§ç¹æ®çå¨è¯å½¢å¼ï¼ç¨æ¥è¡¨ç¤ºè¯´è¯äººæ说çè¯å¹¶ä¸æ¯äºå®ï¼èæ¯ä¸ç§å设ãæ¿æãæçææ¨æµã
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â èæç°å¨æ¶è¡¨ç¤ºä¸ç°å¨äºå®ç¸åçå设ï¼å ¶if ä»å¥çè°è¯å½¢å¼ç¨å¨è¯çè¿å»å¼(be ä¸è¬ç¨were)ï¼ä¸»å¥ç¨would/ should/ could/ might +å¨è¯åå½¢ï¼ä¾å¦ï¼If I were in your position I would marry her.
â¡ èæè¿å»æ¶æ¯è¡¨ç¤ºä¸è¿å»äºå®ç¸åçå设ï¼if ä»å¥çè°è¯å½¢å¼ç¨è¿å»å®ææ¶å³hadï¼è¿å»åè¯ï¼ä¸»å¥ç¨would / should / could / might + have +è¿å»åè¯ï¼ä¾å¦ï¼If it had not rained so hard yesterday we could have played tennis.
⢠大å¤æ°çèææ¡ä»¶å¥å±äºä¸é¢ä¸ç§æ åµçä¸ç§ï¼ä½å¹¶ä¸æé¤åå¨æ¡ä»¶ååæä¸ï¼ä¸ä¸ªåç°å¨æ åµç¸åï¼å¦ä¸ä¸ªåè¿å»æ åµç¸åï¼ä¾å¦ï¼If you had followed what the doctor said, you would not have been so painful now.è¿ä¸ªå¥åå¨é«ä¸åºç°é¢çé¢é«ã
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â é¤äºè¡¨ç¤ºèåæ¡ä»¶å¤ï¼ifä»å¥è¿å¯ä»¥è¡¨ç¤ºå¯¹å°æ¥çæ¨æµï¼ç±äºæ¯å°æ¥è¿æ²¡æåççï¼æ以è°ä¸ä¸æ¯çå®çè¿æ¯èåçï¼åªè½è¯´è¿ä¸ªäºæ åççå¯è½æ§æå¤å¤§ãä¸è¬æ åµä¸ï¼å¯ä»¥ç¨éè¿°è¯æ°çifä»å¥æ¥è¡¨ç¤ºå¯¹ä¸ä¸ªæªæ¥äºå®çæ¨æµï¼è¿ä¸ªäºå®æ¯å®å ¨å¯è½åççãIfä»å¥çè°è¯å½¢å¼ç¨ä¸è¬è¿å»å¼æç¨were to / should +å¨è¯åå½¢ï¼ä¸»å¥ç¨would / should /could/ might +å¨è¯åå½¢ï¼ä¾å¦ï¼Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.ï¼1996å¹´1æå级第44é¢ï¼
â ææ¶å¯ä»¥æå«æå©å¨è¯ãæ æå¨è¯ãbeæhaveçèææ¡ä»¶å¥ä¸çè¿è¯if çå»ï¼èå°had , should, were çè¯æå°ä¸»è¯ä¹åï¼å³ç¨åè£ ç»æ,è¿æ¶åï¼å¦æåºç°notçå¦å®è¯ï¼å¦å®è¯éæ¾å¨ä¸»è¯åé¢ãè¿ç§ç»æå¨å£è¯ä¸å¾å°ä½¿ç¨ï¼ä½é¢é¢åºç°å¨åç±»èè¯ä¸åºç°ï¼ä¾å¦ï¼If it had not rained so hard yesterday we could have played tennis.âHad it not rained so hard yesterday, we could have played tennis.
â 大å¤æ°çèææ¡ä»¶éè¿ä¸é¢æ讲ç两ç§æ¹æ³è¡¨è¾¾ï¼ä½å¨ä¸ªå«å¥åä¸ä¹å¯ä»¥éè¿ä»è¯withoutåä»è¯çè¯but for表达ï¼å¯è¯otherwiseç表达åºæ¥ãä¾å¦ï¼We didn't know his telephone number; otherwise we would have telephoned him.ï¼1995å¹´6æå级第46é¢ï¼å¼å¾æ³¨æçæ¯ï¼å å«but forçå¥åï¼è°è¯å¨è¯å¿ å®è¦ç¨èæå½¢å¼ï¼ä½å å«withoutççè¯çå¥åï¼è°è¯å¨è¯æªå¿ ä¸å®è¦ç¨èæè¯æ°ã
â ææ¶èææ¡ä»¶ä¸æ¯æç¡®å°è¡¨è¾¾åºæ¥ï¼èå¨è´å«å¨ç¨butå¼å¯¼çä»å¥éï¼äºæ¯ä¾¿åºç°äºæè°è¯å¨è¯æ¯èæè¯æ°ç主å¥å ä¸è°è¯å¨è¯æ¯éè¿°è¯æ°çbutä»å¥ææç并åå¤åå¥ï¼ä¾å¦I would have hung you but the telephone was out of order.å¨è¿æ ·çå¥åéï¼å¦æ主å¥æ²¡æç¨èæè¯æ°ï¼æè ä»å¥ç¨äºèæè¯æ°ï¼é½æ¯éçã
â ¡ç¨å¨å®¾è¯ä»å¥ä¸çèæè¯æ°
â å¨è¡¨ç¤ºæ¿æçå¨è¯wishåç宾è¯ä»å¥ä¸ï¼éç¨èæè¯æ°ãï¼wishåçthat 常çç¥ï¼ï¼æ ¹æ®ä¸»å¥æ¶æï¼ä»å¥è°è¯æ¶æç¸åºéåä¸ä½ï¼ä¾å¦ï¼How she wished his family could go with him.
â å¨å ·ææ¿æã请æ±ã建议ãå½ä»¤ç主è§ææ¿çå¨è¯(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide â¦) åç宾è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨(should) +å¨è¯åå½¢ãå¼å¾æ³¨æçæ¯ï¼å¦æ宾è¯ä»å¥çå¨è¯æ¯å¦å®çï¼å¦å®è¯notçä½ç½®åºå¨å¨è¯ä¹åï¼èä¸æ¯å¨è¯ä¹åãä¾å¦ï¼The head nurse insisted that the patient not be move.å¦å¤ï¼å¦suggest表达âæ示âï¼insist表示âåææç§è¯´æ³âæ¶ï¼åé¢çä»å¥ä¸ç¨èæè¯æ°ï¼ä¾å¦ï¼Her pale face suggests that she is ill.æHe insisted that he did not kill the boy.
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â å¨It is+ä¸è¿°å¨è¯çè¿å»åè¯ï¼å ¶åæè·ç主è¯ä»å¥ä¸ï¼å¦It is suggested that pupils wear school uniforms.
â¡ å¨ä¸è¿°å¨è¯ç¸åºçåè¯å½¢å¼ä½ä¸»è¯+è¿ç³»å¨è¯ï¼å ¶åç表è¯ä»å¥ä¸ï¼ä¾å¦His suggestion was that classed be re-scheduled.
⢠å¨å¯¹ä¸è¿°å¨è¯ç¸åºçåè¯è¿è¡è§£éçåä½è¯ä»å¥ä¸ï¼å¦ï¼The workers raised the demand that their pay be increased to cope with the inflation.
â would ï¼hadï¼rather , would soonerä¹ç¨æ¥è¡¨è¾¾ä¸»è§æ¿æï¼å®ä»¬ä¹åç宾è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼è¡¨ç¤ºç°å¨æå°æ¥ï¼ç¨è¿å»å®æå¼è¡¨ç¤ºä¸è¿å»äºå®ç¸åï¼ä¾å¦ï¼I would rather he went right now.
â ¢å ¶ä»å½¢å¼çèæè¯æ°
â it is +necessaryç形容è¯åï¼that主è¯ä»å¥ä¸èæå½¢å¼ä½¿ç¨ï¼è¿ç±»å½¢å®¹è¯å æ¬necessary, important, essential, imperative, urgent, preferable, vital, advisableçï¼ä¾å¦It is necessary that you listen to the teacher carefully.æè It is essential that you be able to pronounce every single word correctly.
â å¨It's (high/about) time ä¹åçå®è¯ä»å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼ï¼ä¾å¦It is high time that you went to school
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â å¨lest å¼å¯¼çç¶è¯ä»å¥ä¸ï¼è°è¯å¨è¯å¤ç¨èæè¯æ°ï¼(should )+ å¨è¯åå½¢ãä¾å¦ï¼ The mad man was put in the soft-padded cell lest he injure himself.ï¼1998å¹´1æå级第38é¢ï¼
â å¨if only å¼èµ·çæå¹å¥ä¸éç¨èæè¯æ°ãè°è¯å¨è¯ç¨è¿å»å¼æè¿å»å®æå¼ãä¾å¦ï¼ Look at the terrible situation I am in! if only I had followed your advice.
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第1个回答 2011-11-05
(1) 对现在情况的虚拟
对现在情况的虚拟,条件句中谓语动词用一般过去时,主句用“would/should/might/could 动词原形”。
(2) 对过去情况的虚拟
对过去情况的虚拟,条件句中谓语动词用过去完成时,主句用“would/should/might/could have 过去分词”。
(3) 对将来情况的虚拟
对将来情况的虚拟,条件句中谓语动词可用should do, were to do或动词的过去式三种形式表示,但意义略有不同。should表示的可能性最大,动词过去式的可能性次之,were to do的可能性最小。主句谓语动词用“would/should/might/could 动词原形”。
(4) 错综时间条件句
有时条件从句谓语动词表示的动作和主句谓语表示的动作发生的时间不一致,这类句子称为错综时间条件句。此时主从句动词的形式应根据各自所表示的时间进行调整。
If you had taken my advice then, you wouldn't be in trouble now.
如果当时听我劝,你现在就不会有麻烦了。(if条件句是对过去的虚拟,故用过去完成时,而主句是对现在的虚拟,故用“would 动词原形”形式。)
(5) 表示“建议、命令、要求、坚决做”等动词后的宾语从句常用“(should )动词原形
(6) wish后的宾语从句
wish后的宾语从句用一般过去时表示现在的情况,用过去完成时表示过去的情况,用would/could do表示将来的情况。
(7) would rather 后的宾语从句
would rather后的从句常用一般过去时形式,表示现在或将来的情况;用过去完成时,表示过去的情况
(8)It is/was important (necessary, appropriate, proper, right, essential, vital, etc.) that
对现在情况的虚拟,条件句中谓语动词用一般过去时,主句用“would/should/might/could 动词原形”。
(2) 对过去情况的虚拟
对过去情况的虚拟,条件句中谓语动词用过去完成时,主句用“would/should/might/could have 过去分词”。
(3) 对将来情况的虚拟
对将来情况的虚拟,条件句中谓语动词可用should do, were to do或动词的过去式三种形式表示,但意义略有不同。should表示的可能性最大,动词过去式的可能性次之,were to do的可能性最小。主句谓语动词用“would/should/might/could 动词原形”。
(4) 错综时间条件句
有时条件从句谓语动词表示的动作和主句谓语表示的动作发生的时间不一致,这类句子称为错综时间条件句。此时主从句动词的形式应根据各自所表示的时间进行调整。
If you had taken my advice then, you wouldn't be in trouble now.
如果当时听我劝,你现在就不会有麻烦了。(if条件句是对过去的虚拟,故用过去完成时,而主句是对现在的虚拟,故用“would 动词原形”形式。)
(5) 表示“建议、命令、要求、坚决做”等动词后的宾语从句常用“(should )动词原形
(6) wish后的宾语从句
wish后的宾语从句用一般过去时表示现在的情况,用过去完成时表示过去的情况,用would/could do表示将来的情况。
(7) would rather 后的宾语从句
would rather后的从句常用一般过去时形式,表示现在或将来的情况;用过去完成时,表示过去的情况
(8)It is/was important (necessary, appropriate, proper, right, essential, vital, etc.) that