Unit 4 Don’t eat in class
1. 祈使句(变否定在句首+don’t)
Be型(be +表语),否定形式:don’t + be +表语
Be quiet,please. Don’t be late!
Come here,please. Don’t play football here.
否定形式:don’t + let sb do sth或者let sb not do sth
No+n/ V-ing No photos /mobile;
No parking/ smoking/ spitting/ talking/ picking of flowers
2. in class在课堂上 in the classroom 在教室
8. Must 与have to
(1)must 表示说话人主观上的看法,意为"必须"。 have to 表示客观的需要或责任,意为"不得不,必须",后接动词原词。
(2)must没有人称,时态和数的变化Have to 有人称,数,时态的变化,其第三人称单数形式为 has to ,过去式为had to. 构成否定句或疑问句时借助动词do/ does。
(3)have to的否定式是needn’t=don’t / doesn’t have to (不必要);must的否定式是must not/ mustn’t(一定不能,不允许)。
13. on school days/ nights
14. break/ follow(obey)the rules
15. Be strict with sb/ oneself
18. get to, arrive in/at, reach,到达(如果后面接地点的副词home,here或there ,就不用介词in ,at, to)
19. remember/ forget+to do要做
20. have fun enjoy oneself
have a good/ great/ wonderful time+V-ing