请用所给单词的正确形式填空。
1. I __________ to the library on Sundays. I __________ to the library yesterday. (go)
2. She often __________ Miss Zhang. She __________ Mr. Wood yesterday. (see)
3. Jenny __________ her homework every day, but she didn't __________ her homework yesterday. (do)
4. Danny __________ __________ checkers now. Yesterday he __________ with a ball. (play)
