它們區別如下:

1 very adv. 很，非常 修飾形容詞或副詞作狀語。如:

His English is very good.

He studies very hard.

2 very much 副詞短語 很，非常 放在動詞後，修飾前面動詞，作狀語。如:

He likes English very much.

Thank you very much.

3 so much 形容詞短語，如此多的，這麼多的，後接不可數名詞，作定語。如:

He has so much homework to do.

There is so much snow on the ground.

4 so adv. /pron./conj. 如此，這樣，因此。當副詞時，用來修飾形容詞或副詞，作狀語。當代詞時，常用放在動詞後，作賓語。當連詞時，引導一個從句，表因果關係。如:

I am so happy.

He studies so carefully.

I think so.

I hope so.

He got up late this morning , so he was late for school.

English is too difficult for him, so he decided to give it up.