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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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