現(xiàn)以“I”為主語,“do”為動詞,把這十二種時態(tài)以實例表達(dá)如下：（例序即為時態(tài)的次序）
1．I do it every day.
（我每天做這樣的事.）一般現(xiàn)在時 動詞用原型
2．I did it yesterday.
（昨天我做了這件事.）一般過去時 動詞用過去式
3．I shall/will do it tomorrow.
（明天我要做這件事.）一般將來時 shall/will + 動詞原形
4．I am doing it now.
（現(xiàn)在我正在做這件事.）現(xiàn)在進(jìn)行時 be動詞 + 動詞現(xiàn)在分詞
5．I was doing it at that time.
（當(dāng)時我正在做這件事.）過去進(jìn)行時 be動詞的過去式 + 動詞現(xiàn)在分詞
6．I shall/will be doing it at 9：00 tomorrow morning.
（明天早晨九時我會正在做這件事.）將來進(jìn)行時 shall/will + be + 動詞現(xiàn)在分詞
7．I have done it already.
（我已把這件事做好了.）現(xiàn)在完成時 have/has + 動詞過去分詞
8．I had done it before I went home yesterday.
（昨天我在回家之前就把那件工作做完了.）過去完成時 had + 動詞過去分詞
9．I shall/will have done it before you come back tomorrow.
（明天在我回來之前我會把這件工作做好.）將來完成時 shall/will + have + 動詞過去分詞
10．I have been doing it for two days.
（這件工作我已做了兩天了.——說話時工作尚未做完,所以還得繼續(xù)做.）現(xiàn)在完成進(jìn)行時 have/has been + 動詞現(xiàn)在分詞
11．I had been doing the work for two hours when the teacher came.
（老師來時那件工作我已做了兩小時了.——當(dāng)時工作尚未完成,所以老師來了我還繼續(xù)在做.）過去完成進(jìn)行時 had been + 動詞現(xiàn)在分詞
12．I shall/will have been doing it for an hour when you come to see me at 9：00 tomorrow morning.
（明天早上九時你來看我時,我會在做那件工作做了一小時.——當(dāng)然尚未能做完,還得繼續(xù)做下去.）將來完成進(jìn)行時 shall/will + have been + 動詞現(xiàn)在分詞