—Why is the classroom so dirty?
—Sorry,sir. It       yesterday, We forgot to do it.
A.doesn’t cleanB.didn’t clean
C.isn’t cleanedD.wasn’t cleaned
D

試題分析:句意:教室為什么這么臟?——抱歉,老師。昨天沒(méi)有打掃,我們忘記做了。結(jié)合語(yǔ)境可知下文描述的是過(guò)去的狀態(tài),故用一般過(guò)去時(shí)態(tài),主語(yǔ)是動(dòng)作對(duì)象,故用被動(dòng)語(yǔ)態(tài)。選D。
點(diǎn)評(píng):英語(yǔ)中的時(shí)態(tài)主要是借助于時(shí)間狀語(yǔ)與上下文語(yǔ)境來(lái)進(jìn)行判斷。解答此類題型,首先要注意句子中的時(shí)間狀語(yǔ),如果沒(méi)有則要通過(guò)分析上下文,結(jié)合語(yǔ)境來(lái)判斷句子的時(shí)態(tài)。語(yǔ)態(tài)的判斷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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