I stumbled across the following in a conversation with a friend who is not a native English speaker. Considering the context, what is the correct way to phrase the second sentence?
They said:
I need to buy something. I am not sure how do you call it in English.
To me, this sounds incorrect but I am not sure why. I can think of a few different ways to rephrase it, but which one is actually grammatically correct?
I am not sure how you call it in English.
I am not sure what you call it in English.
I am not sure how it is called in English.
I am not sure what it is called in English.