七年级英语下册Unit4-Don’t-eat-in-class单元知识点汇总(共5页).doc
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1、精选优质文档-倾情为你奉上Unit 4 Dont eat in class.1. 祈使句的构成和用法概念:祈使句是用来表示请求、命令、叮嘱、邀请、劝告等的句子。结构:祈使句一般以动词原形开头,句末用句号或感叹号。a) Do型祈使句肯定结构:动词原形+宾语+其它否定结构:Dont+动词原形+宾语Open the door.开门Dont play soccer in the classroom.不要在教室里踢足球。b) Be型祈使句肯定结构:Be+表语否定结构:Dont+be+表语Be careful next time!下次要细心!Dont be late for school.上学不要迟到。c
2、) Let型祈使句肯定结构:Let+宾语+动词原形+其它否定结构:Dont+let+宾语+动词原形+其它 Lets not+动词原形+其它Lets go home.我们回家吧。Dont let him go shopping.不要让他去购物。d) No型祈使句结构:No+动词ing 或 No+名词。这种结构的祈使句一般用来表示禁止。No talking禁止讲话(=Dont talk=Stop talking)No photos禁止拍照(=Dont take photos)2. 短语go out外出(娱乐) You cant go out on school nights.在上学的晚上你不能出去
3、(玩)。take out掏出,取出 Please take out a piece of paper.请拿出一张纸。do the dishes=wash the dishes清洗餐具 Please wash the dishes after dinner.晚饭后请清洗餐具。think about sth考虑 Lets think about the fruit and vegetables.让我们考虑一下水果和蔬菜。have fun=have a good time玩得高兴 Have fun.玩得开心! good luck(to sb)祝(某人)好运 Wish you good luck.=G
4、ood luck to you.祝你好运。sb be lucky某人运气好 She is lucky.她运气好。wait for sb等待某人 I am waiting for you.我一直在等你。 arrive late for=be late for为而迟到 Dont arrive late for work.上班不要迟到。fight with sb和某人大家 Dont fight with your classmates. 不要和你的同学打架。make friends交朋友 I want to make friends with you.我想和你交朋友。make sure确信 Plea
5、se make sure he is at home.请确认他在家。make ones bed铺床 Every morning I must make my bed.每天早上我必须铺床。make noise制造噪音 Dont make noise.不要制造噪音。keep quiet=be quiet保持安静 Keep quiet, please.请保持安静。=Please keep quiet.keep healthy保持健康 Running can keep us healthy.跑步能保持我们健康。keep cool保持冷静 Keep cool, dont fight with him.保
6、持冷静,不要和他打架。keep up with跟上 You must keep up with other students.你必须跟上其他学生。3. rule规则(复数形式rules)family rules家规school rules校规follow the rules=obey the rules遵守规则break the rules违反规则make rules制定规则4. “到达”的用法表达get to+地方arrive in+大地方arrive at+小地方reach+地方get to school = reach school = arrive at school到达学校注意:ho
7、me, there, here是副词,因此介词to、in、at要省略,如get home到家5. listen to、hear和sound辨析:两者都表示“听”的意思listen 有意识地听,但不一定听到什么,强调“听”这个动作,结构“listen+to+宾语”hear强调听的结果,“听见”。sound听起来,系动词+adj做表语He cant hear you because he is listening to music now.他听不见你,因为他正在听音乐。That sounds interesting.那听起来有趣。 6. time及相关短语表时间,不可数名词 What time i
8、s it now?现在是什么时间?(几点了?)time 表次数,可数名词 three times三次at the same time同时in time及时on time 准时all the time一直,总是=alwaysfor the first time第一次at times有时,偶尔in the morning/in the afternoon/in the evening在早上/在下午/在晚上at noon=in the middle of the day在中午at night泛指在晚上on school days在上学的白天on school nights在上学的晚上7. wear、
9、put on和get dressed辨析wear表“穿着、戴着”的状态。 She is wearing a red dress today.她今天穿着一件红裙子。put on表“穿上、戴上”的动作 Please put on your coat. It is very cold outside.请穿上你的外套,外面很冷。get dressed 是 get +adj 的用法,dressed是一个过去分词充当形容词,意思是“穿好衣服的”=dress oneself8. have to和must辨析have to +动词原形,强调客观需要;否定形式dont have to不必must+动词原形,强调
10、主观看法Because it is raining outside, I have to take an umbrella.因为外面正在下雨,我不得不带伞。You dont have to get up so early.你不必这么早起床。I must finish my homework before half past eight in the evening.我必须在晚上八点半之前完成我的家庭作业。9. bringto把带到来bringfrom从带来Please bring your English books to school.请把英语书带到学校来。I bring some brea
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