高一英語：英語語法情態動詞的用法介紹2
2017-02-12 22:08:54
來源：精品學習網
ought to
1. ought沒有人稱或時態的變化，后跟帶to的不定式。常譯作“應該”，“應當”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. 你應該立刻出發。
Such things ought not to be done. 這種事不應該干。
--Ought he to go? 他應該走了? --Yes, he ought to. 是的，應該走了。
2. 表可能性
Mary ought to be home by now. 瑪麗這會兒該是到家了。
There is a fine sunset. It ought to be a fine day tomorrow. 今天有晚霞，明天應該是個好天。
It ought to be a fine day tomorrow morning. 明天旱晨大概是個好天氣。
3. 表示沒有履行過去的義務時，用“ought to +完成時。
You ought to have told me about this earlier.(But you didn't) 你本來應該早一點把此事告訴我。(但沒有)
I ought to have written that letter yesterday.(But I didn't) 我本應該昨天寫那封信。(但我沒寫)
It ought to have been done long ago.這事早該做完的。
(責任編輯：康彥林)
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