1they are playing now.
2 he is washing the car.
3 Tom is doing his homework.
4 Mother is cooking dinner.
5 The birds are singing.
They played in the garden yesterday.
2. He worked till late yesterday.
3. They moved to London two years ago.
4. We saw him yesterday.
5 She helped about the house.
1 he has already done his homework.
2They have already moved to London.
3 I have never been to China.
4 He has just come home.
5 I have already read this book twice.