The driver ____ have drunk a lot before the accident, but I'm not quite sure of that．

---Can I watch TV now? ---No, you         .You________ do your homework first.

—Morn, must I clean my room now?—No, you     . You can do it in the afternoon.

Johnny, you      play with the knife; you     hurt yourself.

–– ________ I come back before 6 o’clock?–– No, you _______ . But you ______ be back later than 7 o’clock.