1 Ben feeds the dog every day (否定句)（用now改成现在进行时）
2 My brother has lunch at school （用now改成现在进行时）
3 Let's sit on the grass .)（改成现在进行时）
4 Alice,don't run in the classroom（改成现在进行时）
5 Tom's father is (watching the birds） in the aviary 括号提问