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英語語法虛擬語氣的解析
1、虛擬語氣用于條件狀語從句中
。1)表示與現(xiàn)在事實(shí)相反的假設(shè),條件狀語從句中的謂語動(dòng)詞用過去式(be動(dòng)詞的過去式用were),而主句中的謂語動(dòng)詞用would / should/ could / might + 動(dòng)詞原形。如:
If I were a boy, I would join the army.
If the had time, she should go with you.
。2)表示與過去的事實(shí)相反,條件狀語從句中的謂語動(dòng)詞用過去完成時(shí),主句中的謂語動(dòng)詞則用would / should / might / could + have +過去分詞。如:
If he had taken my advice, he would have succeeded in the competition.
。3)表示與將來事實(shí)相反,條件狀語從句中的謂語動(dòng)詞一般過去時(shí)或should(were to) + 動(dòng)詞原形,而主句中的謂語動(dòng)詞則用would / should/
could might + 動(dòng)詞原形。如;
If it were to rain tomorrow, the football match would be put off.
(4)當(dāng)條件狀語從句表示的行為和主句表示的行為所發(fā)生的時(shí)間不一致時(shí),動(dòng)詞的形式要根據(jù)它所表示的時(shí)間作相應(yīng)調(diào)整。如:
If they had worked hard, they would be very tired.(從句說的是過去,主句指的是現(xiàn)在)
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