Where is your friend come from?Japan这句话哪里错了?

前面有系动词iS，后面有动词必须是ing或是to do ,不可能出现前面有系动词后面动词还是原型，及有is 还出现 come

Where is your friend from?或者Where does your friend come from?

两种改法,因为be from = come from ,即
Where does your friend come from? Japan.
Where is your friend from? Japan.

Where is your friend from？
Where does your friend come from？