Да надо потому что это Present Continiums перед ним всегда ставятся глагол to be если местоимения HE,SHE или It то ставятся is
I was
cooking the meal weal when the door bell rang
Who helped
you to do your home task?
As we were
watching him the small boy was suddenly ran away
He sent a
letter and I stopped worrying as everything seemed OK.
When we
entered the club beautiful girls were singing
It was very
late, but when I entered his room he was reading a book.
<span>When I was walking in the street last night
someone hit.</span>
1. must spoke
2. should have called
3. are able to
4. had to camp outside her dressing room
5. needn't have called