写出下列动词的第三人称单数形式、过去式形式。
1. go _______ _______ 2. enjoy _______ _______
3. buy _______ _______ 4. eat _______ _______
5. get _______ _______ 6. walk _______ _______
7. take _______ _______ 8. dance _______ _______
9. write _______ _______ 10. run _______ _______
11. swim _______ _______ 12.study_______ _______
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