Поставьте предложение во все временные формы: i have not yet received an answer to my letter. 1)present s.2)past s.3)future s.4)present cont.5)past cont.6)future cont.

I don't receive an answer to my letter (Present Simple).
I didn't receive an answer to my letter (Past Simple).
I won't receive an answer to my letter (Future Simple).
I'm not receiving an answer to my letter (Present Continuous).
I wasn't receiving an answer to my letter (Past Continuous).
I won't be receiving an answer to my letter (Future Continuous).