現(xiàn)以“I”為主語(yǔ),“do”為動(dòng)詞,把這十二種時(shí)態(tài)以實(shí)例表達(dá)如下：（例序即為時(shí)態(tài)的次序）
1．I do my homework every day.(1.一般現(xiàn)在時(shí))
（我每天都做作業(yè).）
2．I did my homework yesterday.(2.一般過(guò)去時(shí))
（昨天我做了家庭作業(yè).）
3．I shall/will do my homework tomorrow.(3.一般將來(lái)時(shí))
（明天我要做這作業(yè).）
4．I am doing my homework now.(4.現(xiàn)在進(jìn)行時(shí))
（現(xiàn)在我正在做作業(yè).）
5．I was doing my homework at that time.(5.過(guò)去進(jìn)行時(shí))
（當(dāng)時(shí)我正在做作業(yè).）
6．I shall/will be doing my homework at 9：00 tomorrow morning.(6.將來(lái)進(jìn)行時(shí))
（明天早晨九時(shí)我會(huì)正在做作業(yè).）
7．I have done my homework already.(7.現(xiàn)在完成時(shí))
（我已把作業(yè)做好了.）
8．I had done my homework before I went home yesterday.(8.過(guò)去完成時(shí))
（昨天我在回家之前就把作業(yè)做完了.）
9．I shall/will have done my homework before you come back tomorrow.(9.將來(lái)完成時(shí))
（明天在我回來(lái)之前我會(huì)把作業(yè)做好.）
10．I have been doing my homework for two days.(10.現(xiàn)在完成進(jìn)行時(shí))
（作業(yè)我已做了兩天了.——說(shuō)話時(shí)工作尚未做完,所以還得繼續(xù)做.）
11．I had been doing my homework for two hours when the teacher came.(11.過(guò)去完成進(jìn)行時(shí))
（老師來(lái)時(shí)作業(yè)我已做了兩小時(shí)了.——當(dāng)時(shí)工作尚未完成,所以老師來(lái)了我還繼續(xù)在做.）
12．I shall/will have been doing my homework for an hour when you come to see me at 9：00 tomorrow morning.(12.將來(lái)完成進(jìn)行時(shí))
（明天早上九時(shí)你來(lái)看我時(shí),我會(huì)在做作業(yè)做了一小時(shí).——當(dāng)然尚未能做完,還得繼續(xù)做下去.）