1、 The old couple has been married for 40 years and never once() with each other.
A they had quarreled B they have quarreled C have they quarreled D had they quarreled
这题我选的是D，错的，为什么选C，这类题目当中我总是不知道用 “have” 还是用“had” 请问如何分辨
2、 so difficult () it to live in an english-speaking country that i determined to learn english .
A i have felt B have i felt C i did feel D did i feel
这题我选B ，应该选D，与上题同样不知道在have 还是did 两者选择
3、only when your identity has been checked, （）.
A you are allowed in B you will be allowed in C will you allow in D will you be allowed in
这题我选C, 为什么选D ？
4、it was () back home after the experiments.
A not until midnight did he go B until midnight that he didn't go C not until midnight that he went
D until midnight when he didn't go
这题为什么选C，不选B呢，为什么用went ?
5、() a postgraduate,i would at least master two foreign languages.
A should i become B were i to become C had i become D i should become
为什么用were 不用had 呢
6、() he ill-mannered ,() the laziest and the most irresponsible creature you could ever hope to meet.
A not only is ...but he is also B not only is ...but also C not only is ...but also is he D not only ,,.but als o
这题怎么选A，不选B 了的？
一共八道题，可能 有点儿多，还请语法大神留步帮我详细解答下，不胜感激！
7、() a machine been so efficient and accurate as the electronic computer.
A more than ever before B never before has C in the past ,there never has D formerly ther never was
这题就一点也不懂了，不知道选什么了
8、Little () about him when i first met him in that company.
A have i known B had i known C do i know D did i know
这题跟一开始几题相似，分不清选had 还是did 还是have
A they had quarreled B they have quarreled C have they quarreled D had they quarreled
这题我选的是D，错的，为什么选C，这类题目当中我总是不知道用 “have” 还是用“had” 请问如何分辨
【这道题你没有注意到时态，and 前半句的时态是现在完成时：has been married，所以后半句的时态应该和它保持一致，也用现在的时态】
2、 so difficult () it to live in an english-speaking country that i determined to learn english .
A i have felt B have i felt C i did feel D did i feel
这题我选B ，应该选D，与上题同样不知道在have 还是did 两者选择
【这是个倒装句，如果你不知道该选have还是did，就把原句改回正常语序，即：I felt it so difficult to live...，所以改为倒装时添加的是助动词did】
3、only when your identity has been checked, （）.
A you are allowed in B you will be allowed in C will you allow in D will you be allowed in
这题我选C, 为什么选D ？
【同第2题，only 开头的句子要用部分倒装，正常的顺序应该是 you will be allowed in，改为倒装时，助动词will 提前】
4、it was () back home after the experiments.
A not until midnight did he go B until midnight that he didn't go C not until midnight that he went
D until midnight when he didn't go
这题为什么选C，不选B呢，为什么用went ?
【这里考查的是 not...until 的倒装句的用法，你可以把它看做是固定句型，即 It was + not unti' that 从句】
5、() a postgraduate,i would at least master two foreign languages.
A should i become B were i to become C had i become D i should become
为什么用were 不用had 呢
【这里是 if 条件句虚拟语气的用法，完整的句子应该是 If I were a postgraduate】
6、() he ill-mannered ,() the laziest and the most irresponsible creature you could ever hope to meet.
A not only is ...but he is also B not only is ...but also C not only is ...but also is he D not only ,,.but als o
这题怎么选A，不选B 了的？
【A和B的不同就在于but also 后面的内容，这句话中 not only...but also...连接的是两个句子，not only 句中的谓语动词是 is，but also 后面也需要谓语动词，所以选 but he is also】
7、() a machine been so efficient and accurate as the electronic computer.
A more than ever before B never before has
C in the past ,there never has D formerly ther never was
这题就一点也不懂了，不知道选什么了
【原题中有个been，所以判断是完成时，从B和C中选，而C选项中的there be 句型使用错误，所以答案选 B，这句话的意思是：以前从来没有像电子计算机一样高效精确的机器】
8、Little () about him when i first met him in that company.
A have i known B had i known C do i know D did i know
这题跟一开始几题相似，分不清选had 还是did 还是have
【跟开始几个题一样，思路就是把倒装改成正常语序，即：I knew little about him when I first met him in that company，表示否定的单词little 提前时，句子用部分倒装，即添加助动词 did，所以答案选D】
欢迎追问，O(∩_∩)O~~
2.陈述一过去事实，没必要用完成时
3.应该是被允许进入
4.it is not until...that为固定句式
5.此句为对将来的虚拟，从句用were to,主句用would do如果从句用had，就是对过去的虚拟，主句用would have done
6.这个不好解释，当做固定句型吧，谓语动词放在but also后面
7.选B，是部分倒装
8.选D，when引导了一个过去时间点，用一般过去时
如果不明白，请追问；如果对你有所帮助，采纳，谢谢！祝学习进步！追问
谢谢啦
追答满意请采纳
2.根据determined 获知本句谈论过去的感受，所以用过去时did。have为现在时
3.根据句意，被允许进入,用被动语态
4.not...until 这个结构，变强调句式，习惯上not提到前面去
5.had done 是用于对过去的虚拟的，本句不是针对过去
6. (not only ) he is ill-mannered ,(but he is also ) the laziest and the most irresponsible creature you could ever hope to meet.
B项but also 前后的成分应一致，而题干中前面为句子，后者不是
7.选B.never before从来没有；未曾发生；破天荒；前所未有
1. Her husband had never before had any heart trouble. 她丈夫以前从来没得过任何心脏疾病。
2. Never before has a summit had such a crowded agenda. 以前从来没有一次峰会的日程排得这么满。
3. Never before had he felt the full lash of John's temper. 他以前从未见识过约翰如此暴烈的脾气.
8.D 根据从句 met ，本句用用过去时，不是过去之过去，故选d
A they had quarreled B they have quarreled C have they quarreled D had they quarreled
这题我选的是D，错的，为什么选C，这类题目当中我总是不知道用 “have” 还是用“had” 前半句是现在完成时态，至今为止结婚40年，都没吵过架。后面当然也用现在完成时态。
2、 so difficult () it to live in an english-speaking country that i determined to learn english .
A i have felt B have i felt C i did feel D did i feel
这题我选B ，应该选D，与上题同样不知道在have 还是did 两者选择
我决心学英语是过去式，说明你感觉到困难也是发生在过去。B是现在完成时。D是过去式
3、only when your identity has been checked, （）.
A you are allowed in B you will be allowed in C will you allow in D will you be allowed in
这题我选C, 为什么选D ？
c是主动形式 D是被动形式 验明身份，被允许进去
4、it was () back home after the experiments.
A not until midnight did he go B until midnight that he didn't go C not until midnight that he went D until midnight when he didn't go
这题为什么选C，不选B呢，为什么用went ?
not until 前置才会引起主谓部分倒装
5、() a postgraduate,i would at least master two foreign languages.
A should i become B were i to become C had i become D i should become
为什么用were 不用had 呢
were to do 表示与将来事实相反的假设 had done是对过去事实相反的假设
6、() he ill-mannered ,() the laziest and the most irresponsible creature you could ever hope to meet.
A not only is ...but he is also B not only is ...but also C not only is ...but also is he D not only ,,.but als o
这题怎么选A，不选B 了的？
not only ...but also连接的要相互对应，前面是句子，后面也得是句子。B前面句子，后面是个词组 不符
一共八道题，可能 有点儿多，还请语法大神留步帮我详细解答下，不胜感激！7、() a machine been so efficient and accurate as the electronic computer.
A more than ever before B never before has C in the past ,there never has D formerly ther never was
这题就一点也不懂了，不知道选什么了
B never before has a machine been so efficient and accurate as the electronic computer.
never前置引起部分倒装
8、Little () about him when i first met him in that company.
A have i known B had i known C do i know D did i know
这题跟一开始几题相似，分不清选had 还是did 还是have
在过去的动作之前发生，用过去完成时态。B had i known
第二题你选have felt的话是现在完成时，现在完成时表示的是过去发生的动作对现在造成的影响，但是题目后面说了I determined,用的是过去时，如果改为determin的话，那么你的答案才是正确的
第三题Only 放句首，句子用倒装
第四题的意思是知道午夜他才做完实验回来， not until直到。。才。。顺序不能颠倒
第五题是虚拟语气，表示的是一种假设的情况，用were
第六题选B的话，后半句主语就没有了
第七题选B
第八题little在句首要倒装，选D
