还有have has呢??说的详细点!!
说的详细一点!!!多谢!!
1.be doing 现在进行时
2. was / were doing过去正在进行时
3. be done现在时的被动语态
4. was /were done过去时被动语态
5. be going to do一般将来时
6. was / were going to do过去将来时
have / has
1. have / has done现在完成时
2. had done过去完成时
3. have / has been done现在完成时被动语态
4. had been done过去完成时被动语态追问
那助动词do系列的呢?
追答do / does
可以帮助动词构成疑问句或否定句及强调句
如:Do they like to swim this afternoon?
He doesn't want to watch TV now.
He did come here.他的确来过这儿。
多谢。我其实这个问题很简单,你知道的,助动词do系列和情态动词后面的谓语动词用原形,那么我想知道am is are was were在当成助动词用时,谓语动词的变化是什么?说得详细点。我会加分的。
追答现在分词或过去分词两种。
现在分词变化规则:1 .一般情况下直接加ingthink---thinking 2 .以不发音的字母e结尾的单词,去掉字母e,再加ingwake---waking 3.以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing stop---stopping begin---beginning4. 以ie结尾的动词,把ie改为y ,再加ing lie---lying5.以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing 。begin,cut, get,hit, run, sit, stop, set, swim, fit, dig, forget等。
只要记住方法,把原形变单数第三人称方法
1、一般情况加S
2、以s,x,ch,sh,o结尾的加es
3、y前是辅音改y为i加es
4、特殊情况have变has
empty、empties, emptied emptied...
①直接在动词的后面加上ing,如do→doing,sing→singing,comfort→comforting
②以不发音的e结尾的动词,把e去掉,再加ing,如dance→dancing,hike→hiking
※注意※ 这里的e必须不发音,若发音,则不能去掉,如see→seeing
③最后一个闭音节重读且后面只有一个辅音字母的动词,双写这个辅音字母再加ing,如cut→cutting,swim→swimming
④以ie结尾的动词,要把ie变成y再加ing,如die→dying,lie→lying
以上规则用一句话概括成的口诀就是:直接双写去e,ie变y ing
过去分词:
一般情况下,在动词后加-ed
work→worked listen→listened jump→jumped
2.在以- e结尾的动词后只加-d
close→closed like→liked agree→agreed
3.在以辅音字母加y结尾的动词,应将y改为i再加ed
study→studied carry→carried try→tried
4.以重读闭音节结尾的动词,要双写末尾的辅音字母再加-ed
stop→stopped drop→dropped
以下是不规则动词的过去分词
1)AAA型(动词原形、过去式、过去分词同形)
cost(花费) cost cost cut(割) cut cut hit(打) hit hit
hurt 伤害)...
has/have+过去分词本回答被提问者采纳