am/is/are + ww + ing
of
ww of ww + s/es/ies

They (save) up now because they want to go on holiday next year.
The water (boil) now. Shall I switch it off?
Sometimes, Tom (do) his homework after lunch.
My husband often (read) detective stories.
Look at that girl. I wonder who she (wait) for.
I'm busy at the moment. I (rebuild) my mother's house.
I won't go out now because it (rain) .
I (wear) my favourite skirt today again because I like it.
He always (say) he is the best one but I don't believe him at all.
Hardly anybody (sing) like you do.
'What does Tom think of me?' 'He (think) you are very funny.'
'What does she usually do at the weekends?' 'She usually (walk) the dog.'