用所给词的适当形式填空。
1. John __________(play) football next Sunday.
2. —Will you go swimming with me tomorrow?
—If I __________(be) free, I will.
3. They're singing and dancing ____________ (happy) .
4. Don't make noise, my father __________ (sleep) .
5. What ____________ you ____________(do) just now?
