5道英语选择,希望细致的解答 谢谢

Question

1 Walter offered us a lift when he was leaving the office, but our work ___, we declined the offer.
A. was not finished
B. did not finish
C. has not been finished
D. had not been finished

答案是D自己也选对了，但说实话凭感觉选的- -``觉得had not been finished 应该是用于过去完成时态，不知道这样选对不对…

2 If I ___ home , I would have reminded him of the meeting.
A .was
B. were
C. had been
D. should be
答案是C 我选了两便才选对 先是D后是B 愁S我了。

3 Today the public ___about the way nature is being ruined.
A .is concerning
B. has been concerning
C. is being concerned
D. is becoming concerned
答案是D 我选的C 为嘛啊

4 I haven’t met him for ages, but his mother ___ him sometimes.
A. had still seen
B. still sees
C. has still seen
D. still saw
答案选B 我只认为除了D哪个都好像正确，指点指点```

5 I saw him going out on foot, but he ___ gone there by bus
A. should have
B. ought to have
C. could have
D. must have
答案是C 我开始选的D 因为觉得must have done 有主观推测的意思 随后又选的B ought to含有应该…… 崩溃了。 我发现前面几个带BUT 表转折的题目我全蒙蒙的，希望好好解释下

Answer 1

1） 过去完成时可以表示过去两个动作发生的先后顺序
这种情况，work状态持续到了第二个动作开始。所以过去的过去用过去完成时没有问题。

2 If I ___ home , I would have reminded him of the meeting.
A .was
B. were
C. had been
D. should be
答案是C
我觉得是B

3 Today the public ___about the way nature is being ruined.

这题当中的today不是今天，而是进行时的另一种用法，表示最近一个阶段正在发生的事情或者状态。
concerned 是形容词，前面要和be动词连用

4 I haven’t met him for ages, but his mother ___ him sometimes.
把still去掉，再理解这个选项。
剩下的和频度副词sometimes连用的只能是一般现在时

5 I saw him going out on foot, but he ___ gone there by bus
A. should have
B. ought to have
C. could have
D. must have
答案是C 我开始选的D
这里需要表达的意思应该是“原本可以”吧，而不是推测判断

Answer 2

1 Walter offered us a lift when he was leaving the office, but our work ___, we declined the offer.
A. was not finished
B. did not finish
C. has not been finished
D. had not been finished

答案是D自己也选对了，但说实话凭感觉选的- -``觉得had not been finished 应该是用于过去完成时态，不知道这样选对不对…
这句话整体的时态是过去时。walter offered的时候，our work的状态相对于就是过去的过去。所以用过去完成时。

2 If I ___ home , I would have reminded him of the meeting.
A .was
B. were
C. had been
D. should be
答案是C 我选了两便才选对 先是D后是B 愁S我了。
回家好好看虚拟语气。一口气看好再看这题。过去没发生。

3 Today the public ___about the way nature is being ruined.
A .is concerning
B. has been concerning
C. is being concerned
D. is becoming concerned
答案是D 我选的C 为嘛啊
讲的是一个趋势。所以用become，有变化的过程。原来不concern,现在变了。

4 I haven’t met him for ages, but his mother ___ him sometimes.
A. had still seen
B. still sees
C. has still seen
D. still saw
答案选B 我只认为除了D哪个都好像正确，指点指点```
前句是现在完成时。因为有for ages.
but决定前后 时间一致。所以A，D不对,.
sometimes是一般时的象征。所以又排出C.

5 I saw him going out on foot, but he ___ gone there by bus
A. should have
B. ought to have
C. could have
D. must have
答案是C 我开始选的D 因为觉得must have done 有主观推测的意思 随后又选的B ought to含有应该…… 崩溃了。 我发现前面几个带BUT 表转折的题目我全蒙蒙的，希望好好解释下
就因为But,所以but后边的讲的是事实。表推测的就排除了。

Answer 3

1.整个句子的时态是过去时，所以不会牵扯到现在，排除D,因为工作到那时还未完成，所以用过去完成时。
2.此题是虚拟语气句，排除A D,且后面出现的是would have，说明是对过去的虚拟，所以选had been.
3.此句的翻译应为：公众正越来越关注自然被污染的方式。public与concern之间是主动，所以排除C，B时态不对。A意思不对。
4.此句主要时态还是现在时态的，因为用的是现在完成时，所以排除A D,sometimes表示经常，所以选B.
5.根据前后句，推测这种猜测不是很有把握的，所以排除D啊，而A B是表示本应该做某事，并非表示推测。

Answer 4

5. 这句话的意思是：我看见他走着出去的，但是他也可能乘公车去那儿。A和B 他应该乘公车去，谁规定的？D 他一定是乘公车去的，咋能这么肯定呢？C说的是可能，最合逻辑。

3/4是比较变态的典型的中国考英语的题，不会就不会吧，别费脑子了。
2. 考虚拟语态，记住从句和主句的时态搭配是
过去时-----过去将来时
过去完成时-------过去将来完成时
1. 他下班想捎我们一程，可是我们工作没做完就谢绝了他的好意。谢绝他的好意已经是过去时了，那么在过去那个时点还没完成的事当然要用过去完成时态了。

Answer 5

2 If I ___ home , I would have reminded him of the meeting.
A .was
B. were
C. had been
D. should be

这个是虚拟语气的句子啊，if 引导的非真实条件句，对过去的虚拟，从句用had done，主句用would/could/should/might have done

5 I saw him going out on foot, but he ___ gone there by bus
A. should have
B. ought to have
C. could have
D. must have
我看见他走出去的，但是他可能乘车去。
could 可能 should 应该
表可能就用could，这里不存在什么应该不应该的（should）
还有must have done表示对过去发生的事情的肯定推测，所以也不对