from these option, which are right, and why?<br/>a. had dream (v2+v1)<br/>b. had dreamt (v2+v2)<br/>c. did dream (v2 + v1)<br/>d. did dreamt (v2+v2)<br/><br/>please let me now why those (which you pick) is right, and in what case (ex: past simple, past continuous, ...)