八年级英语下册时态练习题一. 用所给词的适当形式填空1.Listen!A girl_ (sing) in the hall.2.Alison_ (swim) for three hours.3.When I entered the classroom,I found some students _(watch) TV.4.There are some children who _(play) football on the playground.5. How long_you_(do) that?For about four years.6.The young man _(skate) since he was eight years old7.Hed like_(collect) shells because they are beautiful.8.When