写出下列单词的第三人称单数形式。
1. say ________ 2. live ________ 3. study ________
4. watch ________ 5. visit ________ 6. do ________
7. like ________ 8. fly ________ 9. have ________
10. teach ________
【答案】1. says 2. lives 3. studies 4. watches 5. visits 6. does 7. likes 8. flies 9. has 10. teaches
【解析】