Write the complete English question in the Past Simple Tense. have/tickets/how many/you?

To convert the question "how many tickets have you?" into the Past Simple Tense, we need to follow these steps:

1. Identify the original structure: The given question is in the Present Perfect tense.
2. Change the tense: In Past Simple, the verb "have" changes to "had".

Thus, the structure of the question will also change slightly to maintain grammatical correctness.

The correct transformation is:

"How many tickets did you have?"

This question now uses the Past Simple tense, asking about the number of tickets you possessed at some point in the past.