请看下面的题目：

―If he __________，he __________ that food.

―Luckily he was sent to the hospital immediately.

A. was warned，would not take                B. had been warned，would not have taken

C. would be warned，had not taken           D. would have been warned，had not taken

此题应选 B。该题考查与过去事实相反的虚拟语气：此时条件从句的谓语用 had+过去分词，主句的谓语用 would(should，could，might)+have+过去分词(www.yygrammar.com)：

1. If she had worked harder，she __________.

A. would succeed                                      B. had succeeded

C. should succeed                                     D. would have succeeded

2. If my lawyer ________ here last Saturday，he _________ me from going.

A. had been; would have prevented              B. had been; would prevent

C. were; would                                          D. were; would have prevented 

3. I didn’t see your sister at the meeting. If she __________，she would have met my brother.

A. has come                                             B. did come 

C. came                                                   D. had come

4. You didn’t let me drive. If we ________ in turn，you

__________ so tired.

A. drove; didn’t get                                  B. drove; wouldn’t get

C. were driving; wouldn’t get                    D. had driven; wouldn’t have got

答案：1. D 2. A 3. D 4. D