英语的九大时态是那些,用法还有例句

现以“I”为主语,“do”为动词,把这十二种时态以实例表达如下：（例序即为时态的次序）
1．I do it every day.
（我每天做这样的事.）一般现在时 动词用原型
2．I did it yesterday.
（昨天我做了这件事.）一般过去时 动词用过去式
3．I shall/will do it tomorrow.
（明天我要做这件事.）一般将来时 shall/will + 动词原形
4．I am doing it now.
（现在我正在做这件事.）现在进行时 be动词 + 动词现在分词
5．I was doing it at that time.
（当时我正在做这件事.）过去进行时 be动词的过去式 + 动词现在分词
6．I shall/will be doing it at 9：00 tomorrow morning.
（明天早晨九时我会正在做这件事.）将来进行时 shall/will + be + 动词现在分词
7．I have done it already.
（我已把这件事做好了.）现在完成时 have/has + 动词过去分词
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.）过去完成时 had + 动词过去分词
9．I shall/will have done it before you come back tomorrow.
（明天在我回来之前我会把这件工作做好.）将来完成时 shall/will + have + 动词过去分词
10．I have been doing it for two days.
（这件工作我已做了两天了.——说话时工作尚未做完,所以还得继续做.）现在完成进行时 have/has been + 动词现在分词
11．I had been doing the work for two hours when the teacher came.
（老师来时那件工作我已做了两小时了.——当时工作尚未完成,所以老师来了我还继续在做.）过去完成进行时 had been + 动词现在分词
12．I shall/will have been doing it for an hour when you come to see me at 9：00 tomorrow morning.
（明天早上九时你来看我时,我会在做那件工作做了一小时.——当然尚未能做完,还得继续做下去.）将来完成进行时 shall/will + have been + 动词现在分词