have的用法
一、have作助动词
主要变化形式：have，has，had
动名词/现在分词：having
1have +过去分词，构成完成时态，例：
He has left for London.他已去了伦敦。
By the end of last month， they had finished half of their work.
上月末为止，他们已经完成工作的'一半。
2have + been +现在分词，构成完成进行时（现在完成时），例：
I have been studying English for ten years.
我一直在学英语，已达十年之久。
3have+been +过去分词，构成完成时态的被动语态，例：
English has been taught in China for many years.
中国教英语已经多年。
二、have作普通动词形式
为表示习惯动作，do与have连用：
— Do you have earthquakes in your country？ 你们国家地震吗？
— Yes，but we don’t have them very often. 有，但不经常。
have意指take（a meal）（吃），give（a party）（举行）等。
We have lunch at one.
我们1点钟吃饭。
They are having a party tomorrow.
他们明天举行聚会。
I hope you’ll have a good holiday.
我希望你愉快地度过假期。
