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2 3 4 5 6 自學(xué)檢測(cè) 1 Make sentences with the structures in the box. should / shouldn’t… We must / mustn’t… We should take showers often. n.& We should wash the hands before meals. We should often open the window to keep the air fresh. We mustn’t drink sour milk. We should tidy our rooms and often sweep the floor. spit in public. [39。?a??(r) ] 要點(diǎn)歸納 1 情態(tài)動(dòng)詞,沒(méi)有人稱和數(shù)的變化,后跟動(dòng)詞原形 . We should .... 是提建議的一種表達(dá)方式 . 表示有責(zé)任和義務(wù)“應(yīng)該 ……”. We should n?t +動(dòng)詞原形 ,意為“你不應(yīng)該 ……” 常用來(lái)向別人提建議或告誡別人該做什么或不該做什么 . eg: We should get up early every day. We shouldn?t play football in the street. must表達(dá)“義務(wù)”、“責(zé)任” ‘表示“必須” 。其否定式 mustn39。 not only...but also.. 不但 ......而且 ....... 在句中常用來(lái)連接 兩個(gè)對(duì)等的成分 , also可以省略。 She speaks Russian ________in class _______at home. 她在課堂上和家里都說(shuō)俄語(yǔ)。 Not only you but also he ____ watching football matches. 不但你,而且他也喜歡看足球比賽。) not only but also like likes 拓展 amp。 use...to do sth. 使用 .....做某事 eg. 我們經(jīng)常使用詞典去查閱( look up)新單詞。 as ... as possible 盡可能 ...... 與 as...as one can 可互換 eg. Please write down your answers as fast as possible. = Please write down your answers _________________. 請(qǐng)盡快寫下你的答案。 Functions. :填寫 : 2分鐘 : 熟記并能正確使用 . Modal Verbs (Ⅱ ): must/mustn’t。 can You _________ throw litter around. He thinks smoking ______