現(xiàn)在進行時代替將來時
1) 表示即將發(fā)生的或預(yù)定中計劃好的活動。
Are you staying with us this weekend? 這周和我們一起度周末嗎?
We are leaving soon. 我們馬上就走。
2) 漸變動詞，如：get, run, grow, become, begin及die。
He is dying.
時態(tài)一致
1) 如果從句所敘述的為真理或不變的事實，則永遠用現(xiàn)在時。
At that time, people did not know that the earth moves.
He told me last week that he is eighteen.
2) 賓語從句中的助動詞ought, need, must, dare 時態(tài)是不變的。
He thought that I need not tell you the truth.
1) 表示即將發(fā)生的或預(yù)定中計劃好的活動。
Are you staying with us this weekend? 這周和我們一起度周末嗎?
We are leaving soon. 我們馬上就走。
2) 漸變動詞，如：get, run, grow, become, begin及die。
He is dying.
時態(tài)一致
1) 如果從句所敘述的為真理或不變的事實，則永遠用現(xiàn)在時。
At that time, people did not know that the earth moves.
He told me last week that he is eighteen.
2) 賓語從句中的助動詞ought, need, must, dare 時態(tài)是不變的。
He thought that I need not tell you the truth.