每种时态来一句吧：
1. 一般现在时
He always helpsothers. 他总是帮助别人。
2.现在进行时
I am doing my homework我正在做我的家庭作业
3. 现在完成时
John has broken his left
leg.约翰摔断了左腿。
4. 现在完成进行时
We have been working onthis project for over a month now.到目前为止，我们一直在处理那个项目，已经花了一个多月时间了。
5. 一般过去时
I came to school yesterday。我昨天去了学校
6. 过去完成时
There had been some one in
our room just now, because I noticed a burning cigarette end on the floor when
we opened the front door.刚才有人在我们的房间里，因为我们打开前门进来时，我注意到地板上有一支仍在燃烧的香烟。
7. 过去将来时
I said on Thursday I shouldsee my friend the next day.我星期四说我将于第二天拜访我的朋友。
8. 过去进行时
Mary was listening to light
music 10 minutes ago.10分钟前，玛丽正在听轻音乐。
9. 一般将来时
My mother is coming tovisit me next week and is staying here until May.我妈妈下周将来看我，并会呆到5月。
10. 将来进行时
Don't worry, you won't miss
her. She will be wearing a red T-shirt and a white skirt at that time.别担心，你不会认不出她的。她到时会穿一件红色的T恤衫和一条白色的短裙。
11. 将来完成时
The conference will have lasted a
full week by the time it ends.会议从开始到结束将持续整整一个星期
12.将来完成进行时
By the end of next month,
the project will have been being worked for 3 years. 到下个月底为止，这项工程就已经不停地进行了3年了。
13.过去完成进行时
The old clock had been
being taken apart of and fixed up again for several times by my 10-year old son
before I came back home.我回到家之前，我10岁大的儿子已经把这个旧钟表拆卸并重新组装了好几回了。
14.过去将来进行时
The government promised
that a new highway would be being built next July.政府承诺说第二年7月将有一条新的高速公路正在修建。
15.过去将来完成时
I believed by the end of
that year an advanced version of that software would have been developed, but I
was wrong.我坚信到那年年底为止，那个软件的新版本将被开发出来。但是我错了。
16.过去将来完成进行时
They said that by the end
of the following month, the project would have been being worked for 3 years. 他们说到第二个月底为止，这项工程就已经不停地进行了3年了。
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