We asked her whether (was she, she was) married. Nathan asked me how long ( had I studied, I had studied) English

We asked her whether (was she, she was) married.Nathan asked me how long ( had I studied, I had studied) English.
a. He didn’t say where ( he was, was he) going.Ask him where (is Helen, Helen is).
b. I forgot where (did I put, I put) it.I don’t know where (does he live, he lives)
c. He asked me When (I would , would I ) return.Brooke asked me where ( was I, I was) going.
d. I asked him what time (could he, he could) meet us.The supervisor asked me why ( was I, I was) late for work.