时态一致

时间：2016-11-15 23:54:51

（单词翻译:单击）

　　1) 如果从句所叙述的为真理或不变的事实，则永远用现在时。

　　At that time, people did not know that the earth moves.

　　He told me last week that he is eighteen.

　　2) 宾语从句中的助动词ought, need, must, dare¹ 时态是不变的。

　　He thought that I need not tell you the truth.

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1 dare
n.敢，挑战；aux.敢；vi.敢；vt.敢于，勇于面对
参考例句：
He didn't dare to look at her in the face.他不敢正眼看她。 How dare you?Take your hand off me at once.放肆！马上把你的手挪开。