e.g We clean the room every day.
2.壹般過去時: 主語+did
e.g We cleaned the room just now.
3.現在進行時: 主語+am/is/are doing
e.g We are cleaning the room now.
4.過去進行時: was/were doing
e.g We were cheaning the room at 5:00 yesterday afternoon.
e.g 5.現在完成時: have/has done
We have cleaned the room already.
6.過去完成時: had done
e.g We had cleaned the room before he arrived.
7.壹般將來時: will do/
e.g We will clean the room tomorrow.
8.過去將來時: was/were to /would do
e.g He said he would clean the room next.
二、八種時態所用的時間狀語：
壹般現在時 every …, sometimes, at …, on Sunday,
壹般過去時 yesterday, last week, an hour ago, the other day, in 1982, just now
壹般將來時 next…, tomorrow, in+時間,
現在完成時 for, since, so far, ever, never, just, yet, till/until, up to now, in past years, always, recently
過去完成時 before, by, until, when, after, once, as soon as
過去進行時 this morning, the whole morning, all day, yesterday, from nine to ten last evening… when, while
將來進行時 soon, tomorrow, this evening, on Sunday, by this time, tomorrow, in two days, tomorrow evening
三、時態壹致的兩種情況：
1) 如果從句所敘述的為真理或不變的事實，則永遠用現在時。
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 時態是不變的。
He thought that I need not tell you the truth.
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