Sometimes I feel confused about if I should add a preposition, like "come back to Seattle" or "come back Seattle".
If I want to ask a question about where something is made, how to say the question "Where is it made?" or "Where is it made in"?
Learn English – How to ask the question “Where is it made?” or “Where is it made in”
meaning
Best Answer
The correct way to put this is "Where is it made?"
The rule about adding prepositions at the end of a sentence is: only do it if the sentence doesn't make any sense without it. "Where is it made?" makes sense without a preposition, so don't add one.
This resource cleared up this issue for me: http://grammar.quickanddirtytips.com/ending-prepositions.aspx