文档介绍：1. my ( pron. )→ mine (名词性物主代词)我的 2. one ( num. )→ first (序数词)第一→ once (副词)一次 3. boy ( n.)→ girl (对应词)女孩 4. family ( n.)→ families (复数)家庭 5. this ( pron. )→ these (复数)这些 6. friend ( n.)→ friendly ( adj. )有好的→ friendship ( n. )友谊 7. those ( pron. )→ that (单数)那个 8. know ( v.)→ knew ( 过去式)→ known( 过去分词) 知道→ knowledge ( n.) 知识→ knowledgeable ( adj. )有知识的→ well-known ( adj. )著名的 9. take ( v.)→ bring (反义词)拿来→ fetch ( v. )去拿来 10. many ( adj. ) more (比较级)更多的→ most 11. interesting ( adj. )→ interest ( n. )兴趣,爱好→ interested ( adj. )感兴趣的 12. difficult ( adj. )→ difficulty ( n. )困难 13. run ( v.)→ runner ( n. )赛跑的人→ running( 现在分词)跑 14. also ( adv. )→ too (同义词)也→ as well (同义短语)也 15. center ( n.)→ central ( adj. )中心的 16. across ( prep. )→ cross ( v. )穿越→ crossing ( n. )十字路口 17. behind ( prep. )→ in front of (反义短语)在……面前 18. open ( adj. v.)→ closed ( 反义词, adj. ) 关闭的; 停业的→ close ( 反义词 v.) 关闭→( daj. ) be close to…) 19. begin ( v.)→ beginning ( n. )起点,开始→ start (同义词, v.) 20. hungry ( adj. )→ hunger ( n. )饥饿→ full (反义词, adj. )饱的 21. sleep ( v.)→ alseep ( adj. ) 睡着的→ sleepy ( adj. ) 困倦的→ wake ( 反义词, v.) 醒来→ awake ( adj. )醒着的 22. sometimes → at times (同义短语)有时 23. danger ( n.)→ dangerous ( adj. )危险的→ safe (反义词, adj. )安全的 24. left ( adv. )→ right (反义词)在右边 25. dirty ( adj. )→ clean (反义词)干净的 26. policeman ( n.)→ policewoman (对应词)女警察 27. young ( adj. )→ old (反义词)年老的 28. teach ( v.)→ teacher ( n. )教师 29. c