Change the words (按要求改变单词):
1. sad (反义词) _________
2. teeth (单数) _________
3. right (同音词) _________
4. we (宾格) _________
5. thin (反义词) _________
6. peach (复数) _________
7. here (同音词) _________
8. I’m (完整形式) _________
9. he (所有格) _________
10. there (同音词) _________