Questions: DBH sets

Do = do, does did, will do, would do, could do

Be = is, are, was, were, will be, would be, could be

Have= has, had, have, will have, would have, could have

Ask one simple tense: past or present, future or conditional

Ask one continous tense: past or present, future or conditional

Ask one perfect tense: past or present, future or conditional