我想請問一下 What is the difference between A and B ? 當我的回答A和B有很多不同點時，問法是不是要改成: What are the differences between A and B ? 還是一樣用單數的問法就可以了?

Hello, 英文的問句通常用單數為基準來詢問 因為在不知單數或複數得情況下 ,用單數問是最恰當的. ex: Who is in the kitchen? Mom is in the kitchen. ex: Who is in the kitchen? Mary and Tracy are in the kitchen. ex: What is there in the box? A ball is in the box. ex: What is there in the box? Some books and pens in the box. 因此用What is the difference between A and B.來詢問是對的, 即使回答時A和B有很多不同點.

What is the difference between A and B? is used when we want to know the MAIN difference. What are the differences between A and B is used when we want to know DETAILS about the differences. We usually use IS when we emphasize that we DO NOT KNOW or DO NOT CARE about the difference. e.g. What is the difference? Just take this one! We usually use ARE when we want to know the DETAILS about the differences. e.g. What are the differences between an apartment and a condominium? Hope this helps!