Has与have的用法.请各位指教..........谢谢!!!!!!!!!

I/You/They/We have to go to school.
have用于第一人和第二人称或复数名词后.(你和我,你们,我们,他们等)
He/She/It has to go to shcool.has用于第三人称单数或单数名词后(他,她,它等)

have用于第一、二人称或复数名词后：
I/You/We/They have an apple.
has用于第三人称单数或单数名词后:
He/She/it(eg.the dog) has an apple.

has用于第三人称单数或单数名词后是比如he has a dog.have用于第一人称或复数名词后例如we have some dogs.