Unit 5 Theme parks Learning about language课时作业

第一节 单项选择

1. If Mr. Dewey _____ present, he would have offered any possible assistance to the people there.

A. were B. had been G. should be D. was

【考点】考察虚拟语气

【答案】B

【解析】本题考察的是条件状语从句的虚拟语气中的与过去事实相反的情况。与过去事实相反的虚拟语气，条件状语从句要使用"过去完成时had done"，主句要使用"情态动词+have done"。句义：如果Mr Dewey在场，他就会向那里的人提供保证。根据本句后面主句中的would have offered说明与过去事实相反，故从句中使用过去完成时。故B正确。

【试题延伸】if的虚拟语气非常重要，简要概括如下：1、表示与现 在事实相反的情况，从句：If主语+过去时(Be动词用were)；主句：主语+should/would/could/might+do：　2、表示与过去事实相反的情况，从句：If主语+had+done；主句：主语+should/would/could/might+have done　3、表示对将来情况的主观推测，从句：①if+主语+were to do②if+主语+should+do ③if+主语+did（动词过去式）/were ；主句：主语+should/would/could/might+do。

【举一反三】If may car _________more reliable, I would have driven to Lhasa instead of flying last summer.

A. was B. had been C. should be D. would be

【答案】B

【考点】考查虚拟语气。

【解析】根据主语的谓语动词可知题干是表示与过去事实相反的虚拟语气，从句谓语动词用had done，选B。

2.- I've prepared all kinds of food for the picnic.

-Do you mean we_____ bring anything with us?

A. can't B. mustn't C. shan't D. needn't

【考点】考察情态动词