must 只有现在时一种形式（在宾语从句中可以表示过去），而 have to 则有多种时态形式。 例句： She said that she must go with me. 她说她一定要同我一起去. They have had to buy a car. 他们不得不买了辆小汽车. 3). 非谓语形式不同 have to 可以有分词、动名词、不定式等形式，而 must 则没有这些形式。 例句： He only saw her in the evening, having to be away all day. 他整天得外出,只能晚上见她. I regret to have to trouble you again. 我很抱歉不得不再麻烦你一次. 4). 否定式的意义不同 must 的否定式 mustn’t 意为一定不要、不允许； 而 have to 的否定式 don’t have to 意为不必（=needn’t）。 例句： You mustn’t tell him about it. 你一定不要告诉他这件事.（可能是秘密） You don’t have to tell him about it. 你不必告诉他这件事.（他可能知道了） 二、易错点 1. at a time、at one time和at times 1). at a time意为“每次，一次”。 9 / 17 【本资料精心搜集整理而来，欢迎广大同仁惠存！】 例句：I can only talk to one at a time. 我只能一次跟一个人谈话。 2). at one time意为“曾经，一度”。 例句：At one time I used to go skiing every winter. 我有一度每到冬季就去滑雪。 3). at times意为“有时，偶尔”。 例句：Everyone may make mistakes at times. 每个人都会偶尔犯错误。 2. spend, cost, pay, take 1). spend常构成“sb. spends/spent+时间/钱+on+名词/(in) +v.-ing.+名词”句型，意为“某人花时间/钱在某事物上/做某事”。 例句：I spent $100on the bike. 我花了一百美元买下那辆自行车。 She spent the whole afternoon (in) cleaning the windows and the floors. 她花了整个下午的时间打扫窗子和地板。 2). cost主语多是“物”，常用于句型“sth. costs/cost (sb.) some money.\中，意思 是“某物花了(某人)一些钱”。 例句：The shirt cost me five yuan. 我买那件衬衫花了五元钱。 3). pay意为“付款”， 其主语为“人”，常用于句型sb. pays/paid...for sth.中，意思是“某人花……钱买……”。 例句：I'll pay 10yuan for the book. 我要花10元钱买这本书。 10 / 17 【本资料精心搜集整理而来，欢迎广大同仁惠存！】 4). take多用于花费时间，常用句型是“It takes/took sb. some time to do sth.”，意思是“某人花费时间做某事”。 例句：It took the boy two hours to finish his homework. 这个男孩子用了两个小时完成他的作业。 题模一：Unit 4 词汇应用 例1.1.1 Amy, you should remember to _________ your book report on time. A． put in C． hand in B． cut in D． give in 例1.1.2 根据汉语完成下列句子。 1). 在一天的辛苦工作后，我们已经筋疲力尽了。 We were _________ _________ after a _________ _________ work. 2). 在下雪天你要小心，否则你会摔倒的。 Be careful on snowy days, or you will _________ _________. 题模二：语法-疑问词+动词不定式 & must和have to A． can C． has to B． can not D． must 例1.2.2 用所给词的适当形式填空。 1). How _________ (do) it was discussed last night. 2). I didn't know where _________ (go). 3). The difficulty was how _________. (cross) the river. 随练1.1 Our Chinese teacher told us _________ interesting story and _________ story was about Thomas Edison. A． an; a C． a; the A． about B． the; the D． the; the C． by 随练1.2 We should return the books to the library _________ time. B． on D． for 随练1.3 Remember to spend some time _________ your loved ones, because they're not going to be around forever. A． from B． with C． in D． on 11 / 17 【本资料精心搜集整理而来，欢迎广大同仁惠存！】 随练1.4 Keep _________ English and you'll do better. A． talking C． speaking A． to feel C． feel B． to talk D． to speak B． feels 随练1.5 Smiling can make people _________ happy, lively and warm. D． felt 随练1.6 根据汉语完成下列句子。 1. 我看见一群鸟在往北飞。 I saw _________ _________ _________ _________ flying north. 2. 她跌了一跤。但是她迅速爬起来继续跑向终点。 She had a fall. But she quickly got up and_________ _________ _________ _________ _________ the finishing line. 3. 那女孩看见一条狗径直朝她奔来，她忍不住大声叫了起来。 The girl saw a dog _________ _________ her and she couldn't help screaming. 4. 随着太阳升起,我们感到越来越暖和了。 We felt warmer and warmer _________ the sun _________ _________. 5. 我们很害怕,不知道怎样逃离。 We were very afraid and we didn't know _________ _________ _________ _________. 作业1 The movie is very _________. So the children are _________ in it. A． interest; interested B． interested; interesting C． interesting; interested D． interested; interest 作业2 ---You look so tired. What's wrong? ---I didn't go to bed _________ I finished watching “In the Name of People” last night. A． until A． too B． if C． though B． as well D． either D． unless 作业3 Tom doesn't like math. I don’t like it, _________ C． neither 12 / 17 【本资料精心搜集整理而来，欢迎广大同仁惠存！】
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