1) 1 a
2 -
3 -
4 -
5-

2) 1 are walking
2 are doing
3 are going
4 is sitting, is studying
5 is going
6 is playing

3 ) chairs, foxes, flies , knives , children, women, sugars, shorts, schools, feet,wolves , toys
4) 1 are running
2 am doing
3 are going
4 is sitting
5 is walking
6 is playing
7 isn't climbing

5) 1 strong stronger the strongest
2 fat fatter the fattest
3 comfortable more comfortable the most comfortable
4 brave bravier the bravest
5 busy busier the busiest

6) My little sisters are sleeping now
Are my little sisters sleeping now?
What are they doing now?
My little sisters are sleeping now, aren't they?
Are my little sisters sleeping now or playing in the garden?

My frends did their homework yesterday
Did my friends do their homework yesterday?
My friends did their homework yesterday, didn't they?
Did my friends do their homework yesterday?
What did my friends do yesterday?

7) We are writing
They aren't reading
They aren't playing the piano
She isn't singing
Are your friends drinking coffee?
She is working at the table
Are you helping your father?
They are reading a book