16.The electric cooker ______ online is of poor quality.(  )
A.buyingB.to be boughtC.having boughtD.bought

分析 網(wǎng)上購(gòu)買的電子炊具質(zhì)量很差.

解答 答案:D 句中buy作cooker的后置定語,buy與cooker之間構(gòu)成動(dòng)賓關(guān)系,且句意表達(dá)的是客觀事實(shí),要用過去分詞來構(gòu)成.故選D.

點(diǎn)評(píng) 過去分詞是非謂語動(dòng)詞的一種,用法很靈活,分為簡(jiǎn)單式done(表示與謂語同時(shí)或幾乎同時(shí)發(fā)生的動(dòng)作);完成式having been done(表示先于謂語的動(dòng)作).學(xué)習(xí)時(shí),要把握其用法特征:表示被動(dòng)和完成.同時(shí)還要注意區(qū)分現(xiàn)在分詞和不定式.

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