（）in the queue for half an hour,tom sud denly realized that he had left his wallet at home
（）in the queue for half an hour,tom sud denly realized that he had left his wallet at home
a:To wait b:Have waited c:Having waited d:To have waited
為什么要用having?b,
由tom做的動(dòng)作所以用ing形式?表主動(dòng)?、
請(qǐng)一個(gè)一個(gè)的解釋
a:To wait b:Have waited c:Having waited d:To have waited
為什么要用having?b,
由tom做的動(dòng)作所以用ing形式?表主動(dòng)?、
請(qǐng)一個(gè)一個(gè)的解釋
英語人氣：644 ℃時(shí)間：2020-05-24 10:14:36
優(yōu)質(zhì)解答
這是個(gè)非謂語結(jié)構(gòu),真正的謂語動(dòng)詞是 realize ,如果表示主動(dòng)則為 Having done,被動(dòng)則為 Having been done,意思是后面的這個(gè)動(dòng)作在謂語動(dòng)詞表示的動(dòng)作之前發(fā)生,本題中wait 動(dòng)作發(fā)生在realize前,并且是Tom 主動(dòng)發(fā)出的,故為正解.C 選項(xiàng)這種結(jié)構(gòu)是不存在的,沒有to + 完成時(shí)這種結(jié)構(gòu).
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