英语基础语法11.27 时态一致

匿名 2019-04-08 14:03:46 热度:

  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, dare 时态是不变的。
 He thought that I need not tell you the truth.
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