if引导的条件状语从句说明.doc

◆ if引导的条件状语从句 　　条件状语从句是在复合句中作条件状语的句子。表示假如有从句的动作发生就会有主句的动作发生。条件状语从句常由从属连词if引导。 　　if引导的条件状语从句使用须知： 　　一、位置 　　if引导的条件状语从句，既可放在主句之前也可放在主句之后。当从句置于主句之前时，常用逗号与主句隔开。例如： 　　You will catch the bus if you get up early. 　　=If you get up early, you will catch the bus. 　　如果你早起的话，就能赶上公共汽车。 　　二、时态 　　应遵循主、从句时态呼应的原则。当主句是一般现在时 (包含祈使句和含情态动词can, may, must等的句子)，从句也用一般现在时。例如： 　　You must see the doctor if you are ill. 　　如果你生病了，你必须去看医生。 　　If you want to go skating, wear warm 　　clothes. 如果你想去滑冰，穿上暖和点的衣服。 ?1. It was raining heavily___?we got to Paris. A. while???? ???????B. if?? ??????C. when?? ????????D. because2. I don’t know if ___??tomorrow.?A. it doesn’t rain ???????????????? B. the rain will stops ? C. the rains won’t stop ??????????? D. it won’t rain3 . The volleyball match will be put off if it___?????????. A. will rain ??????B. rains ???????C. rained ??D. is raining4. Difficulties are nothing if we ___???not afraid of them A. will? ????B. shall????????? C. are? ?????D. do5. We ___?Beijing tomorrow if it doesn’t rain. A. are going to ???? B. would??? C. shall ???? D. will go6. I don’t like to be interrupted if I___??.?A. speak ?????B. will speak????? C. am speaking??? D. spoke7. If you ___??the book you will understand the story better. A. will be reading??? B. have read???? C. will have read??? D. read8. If you ___??I will go with youA. go to ????????B. went ????????C. will ?????D. should go9. I’ll go to meet you，if I ___???free then. ??A. would be ????? B. will be???? C. am ???????? D. was10. If you ___??to the music, buy a CD. A. will listen??? ?B. listen ????? ?C. listening ??? D. listened11. He suggested ___??a pinic tomorrow.A. to have ??????B. having ?????C. have ? ???D. to having12. Be careful, if you ___???want to make mistakes.?? A. won’t ???????B. don’t ??????C. didn’t ??????D. not13. Work hard if you ?___????to get a good mark. A.?wanted ??????B. wanting ???? C. want ???????D. will want14. I want to know if you___???to the party tomorrow. ??