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1、., . .Unit 4 I used to be afraid of the dark.语法used to 的用法1.“used to do sth”意为“过去常常做某事”，表示过去的习惯动作或状态，现在已不发生或不存在。She used to be thin,but now she is fat.The young man used to wear glasses,but now he doesnt wear glasses.2.带used to的句子的各种句式的构成：(1)肯定句的构成是:主语+ used to do sth. He used to play basketball aft
2、er school.(2)否定句的构成是:主语+ didnt use to do sth. She didnt use to have long hair.(3)一般疑问句构成是: Did+主语+use to do sth? 肯定回答是： Yes,主语+did 否定回答是：No,主语+didnt Did he use to play the piano? Yes,he did/ No,he didnt(4)反意疑问句的构成是：didnt+主语？ She used to be very thin, didnt she?3.妙用异同(1)used to do sth.表示过去习惯性的动作或经常性的
3、状态.He used to smoke,didnt he?(2)be used to doing sth表示“习惯于做某事”My parents are used to getting up early. (3)be used to do sth=be used for doing sth是被动结构，表示“被用来做某事”The knives are used to cut things.=The knives are used for cutting things.(1)Wow! You look different! You wear glasses.Yes,I did. But now I
4、 am wearing contact lenses(隐形眼镜)A.could B. must C.used to D.would(2) When I was a child, I used to _ strawberry.A. liking B. like C. liked D. likes(3)_ study in No.4 Middle School? A. Did you used toB. Did you use toC. Do you used toD. Do you use to(4)She used to with her parents, but now she is use
5、d to_with her classmates at school. A. live; living B.live; live C.living; living D.living; live(5)Mother used to grow flowers in her garden.(改为否定句)Mother grow flowers in her garden.(6)The little girl often wore a skirt in the past.(同义句)The little girl a skirt.(7)You used to be very strong, ? (完成反意疑
6、问句)反意疑问句的用法1.含义、构成和回答反意疑问句也叫附加疑问句, 反意疑问句表示说话人对所陈述的事情有所怀疑或不肯定，想通过对方的回答来加以肯定或否定。它的结构由两部分组成：陈述句简短问句。如果前一部分为肯定形式，后一部分用否定形式；前一部分为否定形式，后一部分就用肯定形式。也就是说反意疑问句要遵循“前肯后否，前否后肯”的原则。反意疑问句的回答和一般疑问句的回答是一样的。Mary likes reading，doesnt she？Mary doesnt like reading，does she？Yes,she does.No,she doesnt Youre a new student，
7、arent you？You arent a new student，are you？Yes,I am.No,Im not (1)John had a short walk after lunch, ?A.did he B. didnt he C.had he D.hadnt he(2)There isnt any water in the bottle, ?A.is it B.is there C.isnt it D.isnt there(3)Shes come back, _ she? A. is B. isnt C. has D. hasnt2.反意疑问句应注意三点： (1)除了no,no
8、t以外的其他否定词有never（从不）,nothing（没有什么）,few（几乎没有）,little（几乎没有）,hardly（几乎不）,seldom（不常，很少）而unhappy（不高兴的）,uncrowded（不拥挤的）,dislike（不喜欢）等不是否定词。She has few friends,does she? Yes,he does.Jim never goes to the movies on Saturday, ?A.does Jim B.doesnt Jim C.doesnt he D.does he(2)祈使句的反意疑问句,一般在句末用will you（包括以Let us开
9、头的祈使句）;而以lets开头的祈使句,其反意疑问句是shall we?Lets go out for a walk,shall we? Let us go out for a walk,will you?Dont drink too much,will you?Youve just finished your listening exam.Please get yourself ready for the next part, ?A.shall we B.will you C.do you D.are you(3)对反意疑问句的回答,不管问题的提法如何,如果事实是肯定的,就要用yes;事实是
10、否定的,就要用no.(1)Hawk isnt at school today,is he? .I met him in the classroom just now.A.Yes,he isnt B. Yes,he is C.No,he isnt D.No,he is(2)You havent been to Sanya, have you? _. How I wish to go there! A. Yes, I have B. No, I havent C. No, I have D. Yes, I havent(3)Mr.Wangs never been to Canada, has he
11、? .He went there on business last week.A.No,he hasnt B.Yes,he has C.No,he has D.Yes,he hasntSection A1.区分be like和 look like (1)be like多用于描述人的性格、品质等，也可以提问外表 Whats Alice like?She is quiet and a little shy.(2)look like只用来描述人的长相、外貌。What does your father look like? He is very tall and fat.2.keep silent意为
12、“保持沉默”3.helpful意为“有用的，有帮助的”。be helpful to sb/sth“对某人/某物有帮助” My teacher gave me lots of helpful books in math.4.形容词/副词+enough 意为“足够的” He runs quickly enough. We have enough time to do our homework. The dining hall is to hold(容纳) 300 people. A.enough big B.enough small C.small enough D.big enough5. to
13、oto常和 notenough to及 sothat进行同义句转换He is too young to go to school.=He isnt old enough to go to school.=He is so young that he cant go to school.(1)The problem is too difficult for me to work out.(改为同义句)The problem isnt for me to work out. (2)Shes not strong enough walking up mountains.A.to go B.going
14、 C.go D.went6.from time to time意为“时常，有时” From time to time he gave him a encouraged nod.7.since后接一般过去时的从句，看见since后接一般过去时的从句，要用现在完成时。 (1)She has taught us English since I (come) to this school. (2)My uncle (teach) in this school since he was twenty years old.8.辨析：become,turn,get 和go(1)become通常指身份、职位的变化 She became an English teacher.(2)turn指颜色或性质的变化 The leaves in the trees turn yellow in autumn.(3)get
