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高一英語:英語語法情態(tài)動(dòng)詞的用法介紹2

2017-02-12 22:08:54 來源:精品學(xué)習(xí)網(wǎng)

   ought to

  1. ought沒有人稱或時(shí)態(tài)的變化,后跟帶to的不定式。常譯作“應(yīng)該”,“應(yīng)當(dāng)”等,和should同義,只是口氣稍重一些。其否定式為ought not to (oughtn't to ),疑問式為Ought I /you to„?

  You ought to start at once. 你應(yīng)該立刻出發(fā)。

  Such things ought not to be done. 這種事不應(yīng)該干。

  --Ought he to go? 他應(yīng)該走了? --Yes, he ought to. 是的,應(yīng)該走了。

  2. 表可能性

  Mary ought to be home by now. 瑪麗這會(huì)兒該是到家了。

  There is a fine sunset. It ought to be a fine day tomorrow. 今天有晚霞,明天應(yīng)該是個(gè)好天。

  It ought to be a fine day tomorrow morning. 明天旱晨大概是個(gè)好天氣。

  3. 表示沒有履行過去的義務(wù)時(shí),用“ought to +完成時(shí)。

  You ought to have told me about this earlier.(But you didn't) 你本來應(yīng)該早一點(diǎn)把此事告訴我。(但沒有)

  I ought to have written that letter yesterday.(But I didn't) 我本應(yīng)該昨天寫那封信。(但我沒寫)

  It ought to have been done long ago.這事早該做完的。

  (責(zé)任編輯:康彥林)

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