语法知识归纳总结+情态动词+第三讲：must-have+to用法和辨析课件--名师微课堂（自制）.ppt

1、语法知识归纳总结情态动词 第三讲 must/have to用法和辨析,讲师：孙仕美,要点归纳,must/have to,1.must表达“情感、态度、语气”，主要有以下用法： （1）must表示主观的义务和必要，主要用于肯定句和疑问句，意思为“必须，得，要”； 由must引起的疑问句，肯定回答要用must或have to， 否定回答要用,必须的! must,（2） must的否定形式mustnt表示禁止，意思是“不能，不许”。例如：,（3） must用于条件句或疑问句中，可以用来表示责备、抱怨的感情色彩，意思为“偏要，硬要，干嘛”。例如： （山东高考真题）,典型应用,（湖南高考真题） Its

2、the office! So you know eating is not allowed here. Oh, sorry.,（全国高考真题） I cant leave. She told me that I stay here until she comes back. A. can B. must C. willD. may,（福建高考真题） Shall I inform him of the change of the schedule right now? I am afraid you , in case he comes late for the meeting.,（辽宁高考真题）

3、 Doctors say that exercise is important for health, but it _ be regular exercise.,（上海春季高考真题） When I was young, I was told that I _ play with matches.,（重庆高考真题） You park here! Its an emergency exit. A. wouldntB. needntC. couldntD. mustnt,（全国高考真题） If you _ smoke, please go outside. A. canB. should C. m

4、ust D. may,（辽宁高考真题） If you _ go, at least wait until the storm is over. A. canB. may C. mustD. will,（重庆高考真题） _ you interrupt now? Cant you see Im on the phone? Sorry Sir, but its urgent. A. Can B. Should C. Must D. Would,（江西高考真题） I have told you the truth. _ I keep repeating it? A. Must B. Can C. Ma

5、y D. Will,易混辨析,haveto与其他情态动词一样，后接动词原形，表示客观上的需要，强调被迫性，有“不得不”的含义。haveto可用于多种时态，形式随时态变化而变化。,不得不记 have to,2. have to有人称、数、时态的变化，而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。 He had to look after his sister yesterday. 昨天他不得不照看他的妹妹。,（湖南高考真题） You _ buy a gift, but you can if you want to. A. mustB. mustnt C. have toD. dont have to,（重庆高考真题） What do you think we can do for our aged parents? Youdo anything exce