has是第三人称单数. 如果主语是it , she , he 或是表示第三人称的名词如my brother, my teacher. Tom. Mr Green等时,谓语用has.如 My brother has a bike.
have是原形.当主语为第一人称, 第二人称或第三人称复数时用它. 如 I have a book.
we have some flowers. / They have bags. /You have a pen.
但是在否定句和疑问句中谓语部分都用原形have. 而用do或does来表示人称.如
Do you have, ,/ does he,she,it have ...
They don't have,/He,she.it doesn't have,