你知道什麼叫懸垂分詞嗎？請(qǐng)看看這道題： __________ the road，a car knocked him down. A. Crossing B. Crossed C. When he was crossing D. To cross 此題應(yīng)選C。其餘均可能被誤選。分析如下： 選項(xiàng)B不對(duì)，因爲(wèi)它是過去分詞，其後不應(yīng)有賓語。 選項(xiàng)A，D不對(duì)，因爲(wèi)該非謂語動(dòng)詞的邏輯主語與句子主語不一致——搆成懸垂分詞。 一般說來，作狀語用的非謂語動(dòng)詞的邏輯主語應(yīng)與句子主語保持一致，否則便是錯(cuò)句。比較： 爲(wèi)了通過考試，(他)每分鍾都用來學(xué)習(xí)。 誤：To pass the exam，every minute was spent in studying. 正：To pass the exam，he spent every minute in studying. 信讀了第二次之後，意思就更清楚了。 誤：Reading the letter a second time，the meaning became clearer. 正：Being read a second time，the letter became clearer in meaning. 狗叫得厲害，所以我把它放了出去。 誤：Barking madly，I led the dog out. 正：Barking madly，the dog was let out. 但是，在有些特殊的結(jié)搆(衹有少數(shù)固定結(jié)搆)中，非謂語動(dòng)詞可以沒有邏輯主語： Judging from [by] what he said，he was a cheat. 從他說的話來看，他就是個(gè)騙子。