1．Tom and his father ________ (swim) now.
2．Look !They ________ (run) along the street.
3．We ________ (practice) hard these days because we will have a big match next month.
4．What ________ he ________ (do) at nine o'clock last night.
5．They ________ (listen) to the music at that time.
6．When the headmaster came in, the students ________ (read) the text.
7．We ________ (watch) TV when suddenly the telephone rang.
8．She ________ (make) the paper flowers the whole night.
9．________ you ________ (study) English? Yes, I am.
1．Look ! He is dancing.（一般疑问句）
2．The farmers weren't working last year.（肯定句）
3．The teachers are having a meeting.（对划线部分提问）
4．The boys are cleaning their room.（对划线部分提问）
5．The singer is singing some famous songs.（否定句）
6．I am studying English, too.（变为否定句）