用所给词的正确形式填空。
1.Look, my father ________ (play) basketball with his friends.
2.There ________ (be) some water on the table just now.
3.—What ________ you ________ (do) just now?
—I ________ (go) for a walk.
4.Mr Green often ________ (have) a chat with his children after supper.
5.We ________ (buy) a lot of fruits yesterday.