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promise的用法祈使句+and+陈述句知识点 1、promise sb. to do sth.=allow/permit sb. to do sth.=允许/答应某人做某事 分析：二者的汉语意思一样。但用法有区别，请看例子： My father promised me to give up smoking. 我爸爸答应我戒烟。 （是“爸爸”戒烟，而不是“我”戒烟。即：动词不定式是主语发出的动作） My father doesn’t permit/allow me to smoke. 我爸爸不允许我抽烟。 在此结构中，动词不定式是宾语发出的动作。 另外，两者的结构区别如下： promise to do sth.（后跟不定式） allow/permit doing sth.（后跟动名词） 例：I promised to help him with his English. Drinking wine is not allowed /permitted in our school. 2、provide vt.提供；供给①provide n. for ②provide n. with The government provided food and houses for those who were homeless. 政府给无家可归的人提供食宿。 The school provides the students with textbooks. 或：The school provides textbooks for the students. 学校为学生提供课本。 3、祈使句+and+陈述句 1）这种结构可以替换成“条件句+陈述句”。如： Work hard,and you’ll be successful in time./If you work hard,you will be successful in time. 只要你努力，一定会成功。 注意：祈使句后and可替换成then. 2）祈使句+or+否定陈述句=否定条件句+否定陈述句。如： Get ready or you won’t pass the test./ If you don’t get ready,you won’t pass the test. 做好准备，要不你小测验不会及格的。 注意：祈使句后的or可替换成otherwise. 1. There _____ be any difficulty about passing the road test since you have practiced a lot in the driving school. A. mustn’t B. shan’t C. shouldn’t D. needn’t 2. I was on the highway when this car went past fol. Lowed by a pol ice car. They ______ at least 150 kilometers an hour. A. should have been doing B. must have been doing C. could have done D. would have done 3. — I’ve taken someone else’s green sweater by mistake. — It ______ Harry’s. He always wears green. A. has to be B. will be C. mustn’t be D. could be 4. — Catherine, I have cleaned the room for you. — Thanks. You ______ it. I could manage it myself. A. needn’t do B. needn’t have done C. mustn’t do D. shouldn’t have done 5. — Lucy doesn’t mind lending you her dictionary. — She _______. I’ve already borrowed one. A. can’t B. mustn’t C. needn’t D. shouldn’t 【答案与解析】 1. 【解析】C should(按道理)应该;句意：既然你在驾校时做了大量练习，那么通过这次考试理不应该有困难。 2. 【解析】B 第一句话使用了一般过去时，由此可知第二句话是对过去事情的猜测，需用must have done.本题意为“我正在高速公路上行驶，这时一辆警车跟随着着这辆车从旁边经过。它们一定是以至少每小时150公里的速度行驶。”故选B。A项表示“本应该……”，C项表示“本能够……”不合题意。 3. 【解析】D 本题考查情态动词的用法。句意是“我错拿了别人的绿色 毛衣”，“那可能是Harry的，他总是穿绿色的毛衣”。四个选项中could表示推测。mustn’t 表示 “禁止”;has to 表示“不得不”;will 表推测时，表“肯定“语气太强。 4. 【解析】B根据句意可知Catherine对对方为她打扫了房间表示感谢并提到对方本来不必为她打扫房间。很显然对方打扫房间是过去所为，表达“去不必做某事”用needn’t have done sth. 5. 【解析】C本题考查情态动词，从答语的后半句“我已经借到一本字典了”，可知前半句为“不必了”。故C正确。 
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