when i use DID do i need to put the verb in presente?
You did went to United states.
You did go to the United states.
Yes, you have to use the present-tense form of the verb when you use did.
Did you go to the movies last night?
Yes, I went to the movies last night.
Yes, I did go to the movies last night.
I thought I saw you yesterday.
I am sure I saw you yesterday.
I did see you yesterday.