用clean the room短語表達出英語八種時態：
1.一般現在時:主語+do/does （標誌詞:often,usually,every day,on Sundays, ...）
例:We clean the room every day. 我們每天打掃房間。
He cleans the room every day.他每天打掃房間。
2.一般過去時: 主語+did （標誌詞: just now,yesterday,last night,last week,...）
例:We cleaned the room just now. 剛才我們打掃了房間。
3.現在進行時: am/is/are doing （標誌詞:look,listen,now,at the moment,...）
例:We are cleaning the room now. 現在我們正在打掃房間。
4.一般將來時: will do/be going to （標誌詞:tomorrow,next day,next week, ...）
例:We will clean the room tomorrow. 明天我們將打掃房間。
We are going to clean the room tomorro. 明天我們打算打掃房間。
5.過去進行時: was/were doing （標誌詞:at that time, at this time yesterday, ...）
例:We were cleaning the room at that time. 在那時我們正在打掃房間。
6.現在完成時: have/has done （標誌詞:already,yet,recently,so far,ever,never,for+時間段,since+時間點, ...）
例:We have already cleaned the room. 我們已經打掃了房間。
7.過去完成時: had done （標誌詞:by the end of last year, ...）
例:We had cleaned the room before he arrived. 在他到達以前我們已經打掃完了房間。
8.過去將來時: would do （標誌詞:the next day, ...）
例:He said he would clean the room the next day.他說第二天他會打掃房間。