Anyone meets situations, in which we don't know how many TENSES (past, present and future) should be used in one sentence?
For example, in this formal conversation:
A: Are you from Asia? I think so though
B: Yes, you are right. What's your stereotype for most Asian people?
A: They eat chicken feet...
B: By the way, why "did" you think I "am" from Asia?
Is the last one correct? Could we use both [did (for the past)] and [am (for the present)] in one sentence?
Because I was told that in one sentence only one tense could be used and using the present tense to express anything would be correct because I am really from Asia. So it's correct the use of "am" here?