Unit 4 Don’t eat in class.1. 祈使句的构成和使用方法概念：祈使句是用来表达祈求、命令、叮嘱、邀请、劝说等的句子。构造：祈使句一般以动词原形开头，句末用句号或感慨号。a)Do 型祈使句肯定构造：动词原形+宾语+其他否认构造：Don’t+动词原形+宾语Open the door.开门Don’t play soccer in the classroom.不要在教室里踢足球。b)Be 型祈使句肯定构造：Be+表语否认构造：Don’t+be+表语Be careful next time!下次要细心！Don’t be late for school.上学不要迟到。c)Let 型祈使句肯定构造：Let+宾语+动词原形+其他否认构造：Don’t+let+宾语+动词原形+其他 Let’s not+动词原形+其他Let’s go home.我们回家吧。Don’t let him go shopping.不要让他去购物。d)No 型祈使句构造：No+动词 ing 或 No+名词。这种构造的祈使句一般用来表达严禁。No talking 严禁发言（=Don’t talk=Stop talking）No photos 严禁拍照（=Don’t take photos）2.短语go out 外出（娱乐） You can’t go out on school nights.在上学的晚上你不能出去（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 Let’s think about the fruit and vegetables.让我们考虑一下水果和蔬菜。have fun=have a good time 玩得快乐 Have fun.玩得开心！ good luck(to sb)祝（某人）好运 Wish you good luck.=Good 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 Don’t arrive late for work.上班不要迟到。fight with sb 和某人大家 Don’t 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 Please make sure he is at home.请确认他在家。make one’s 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 Don’t make noise.不要制造噪音。keep quiet=be quiet 保持安静 Keep quiet, please.请...
