判断下列句子中划线单词的词性。 1. Mary dances well . 2. His father is reading. 3. Tom is looking for his watch . 4. He often plays violin after school. 5. Mr. Green works in a university. 6. The teacher taught us an English song . 7. I have bought this pen for two years. 8. Nothing can live without water. 9. You may keep this dictionary for two weeks. 10. You can’t agree with me .