It’s a rule in my class that our classroom ______ before 6:00 p.m. every day.
A.be able to cleanB.should be cleaning
C.must cleanD.must be cleaned
D

試題分析:be able to能,強(qiáng)調(diào)自身能力能夠做某事;should應(yīng)該;must一定。句意:每天下午六點(diǎn)前必須打掃教室,在我們班是一條規(guī)定。結(jié)合語(yǔ)境可知從句主語(yǔ)是動(dòng)作的對(duì)象,故用被動(dòng)語(yǔ)態(tài),選D。
點(diǎn)評(píng):情態(tài)動(dòng)詞的區(qū)別主要在于表達(dá)語(yǔ)氣的不同,需要結(jié)合語(yǔ)境具體分析。語(yǔ)態(tài)問(wèn)題主要是確定句子主語(yǔ)與謂語(yǔ)動(dòng)詞的關(guān)系。如果是主動(dòng)關(guān)系則用主動(dòng)語(yǔ)態(tài),反之如果是動(dòng)賓關(guān)系,則用被動(dòng)語(yǔ)態(tài)。
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