When the main clause verb is in the past tense, the dependent clause verb must also be in the past tense.
She asked if I am dressed.
(main clause verb/asked/past – dependent clause verb/am/present)
She asked if I was dressed.
(main clause verb/asked/past – dependent clause verb/was/past)The teacher knew they haven’t done their homework.
(main clause verb/asked/past – dependent clause verb/haven’t done/present)
The teacher knew they hadn’t done their homework.
(main clause verb/asked/past – dependent clause verb/hadn’t done/past)He told her that he will come.
He told her that he would come.
