have有实义动词“有”,“吃”,“上课”的,使用方法和一般的实义动词一样,eg,
They have many useful books.
He has lunch at 12:00 every day.
He has English every day.
have还有助动词的用法,用于完成时态中.比如,has/have + done,had+done
He has done his homework.
The trian had left by the time he got outside.