Ex.17
1 They often go to the country.
They are going to the country now.
2 She always helps her mother .
She is helping her mother now.
3We go to the school every morning.
We are going to the school now.
4 They often play in the yard.
They are playing in the yard now.
5 Tom isn’t play basketball .
Tom doesn’t playing basketball now.
Ex.18
1 David(to play)in the yard now.
David is playing in the yard now.
2 We usually(to have) dinner at home .
We usually have dinner at home.
3 Kate (to water )the flowers every day.
Kate waters the flowers every day.
4 Children (to sing) now.
Children are singing now.
5 Mike usually(to do)his homework in the evening .
Mike usually does his homework in the evening.