do和have的区别和用法

have + been +现在分词，构成完成进行时。例如：

I have been studying English for ten years. 我一直在学英语，已达十年之久。

have +been +过去分词，构成完成式被动语态。例如：

English has been taught in China for many years. 中国教英语已经多年。

do 的`用法

构成一般疑问句。例如：

Do you want to pass the CET? 你想通过大学英语测试吗？

Did you study German? 你们学过德语吗？

do + not 构成否定句。例如：

I do not want to be criticized.  我不想挨批评。

He doesn't like to study.  他不想学习。

n the past, many students did not know the importance of English.

过去，好多学生不知道英语的重要性。