常见的重读闭音节动词在加ed 或ing时

节：辅音字母+元音字母+辅音字母
重读闭音节三要素：1）单词末尾最后一个音节必须是重读音节；
2）最后只有一个辅音字母；
3）最后一个辅音字母前的元音字母发短元音prohibit--- prohibited-- prohibited-- prohibiting
（重读在第二音节，非重读闭音节，不双写）。

常见的重读闭音节动词在加ed 或ing时，需要双写
1. Admit (admitted-admitted) admitting准许进入
2. Ban(banned-banned) banning (ban sb from doing sth) 禁止
3. Beg (begged-begged) begging (beg sb for sth) 请求
4. Begin(began-begun) beginning开始
5. Chat (chatted-chatted) chatting聊天
6. Clap (clapped-clapped) clapping(鼓掌)
7. Control (controlled-controlled) controlling控制
8. Dip (dipped-dipped) dipping (蘸)
9. Dig (dug-dug)digging挖，寻
10. Drag (dragged-dragged)dragging (拖，拉，拽）
11. drop (dropped-dropped)dropping落下; 投下
12. forget (forgot-forgot/forgotten)forgetting忘记
13. Get (got-got) getting得到
14. Hug(hugged-hugged) hugging拥抱
15. Infer (inferred-inferred)inferring(推断)
16. Nod(nodded-nodded) nodding点头
17. Occur(occurred-occurred) occurring发生
18. Pat (patted-patted) patting拍打
19. Permit(permitted-permitted) permitting允许
20. Pin(pinned-pinned) pinning（别针，别）
21. Plan(planned-planned) planning计划
22. Prefer (preferred-preferred) preferring更喜欢
23. Regret (regretted-regretted) regretting遗憾，后悔
24. Rob (robbed-robbed) robbing(rob sb of sth)抢夺
25. Ship(shipped-shipped)shipping(用船运）
26. Shop（shopped-shopped）shopping购物
27. Sit (sat-sat)sitting坐
28. Skip (skipped-skipped)skipping(跳，跳读，遗漏）
29. Sob（sobbed-sobbed) sobbing(啜泣）
30. Star（starred-starred）starring(主演）
31. Step （stepped-stepped）stepping脚步，踏入
32. Stop (stopped-stopped) stopping停止
33. Swim (swam-swum) swimming游泳
34. Tap(tapped-tapped) tapping(轻敲)
35. Trap（trapped-trapped）trapping(圈套)
36. Win(won-won) winning赢
37. Wrap(wrapped-wrapped) wrapping包裹，包装
38. Cut (cut-cut) cutting切
39. Fit(fit-fit) fitting安装；使……适应；使……合身
40. Hit(hit-hit) hitting打，打击; 碰撞
41. Let(let-let)letting允许，任由;让
42. Put (put-put)putting放
43. Set (set-set) setting安装，设置
44. Shut(shut-shut)shutting关
45. Spit (spit-spit)spitting .吐，吐口水
46. Split（split-split）splitting劈开, (使)裂开, 分裂, 分离
47.Equip equipped equipping 装备，安装
48stir----stirred----stirring搅拌；激起；惹起
49rub----rubbed----rubbing擦，摩擦;用…擦;触怒
注意：
Write wrote written writing
Play played played playing
Pay paid paid paying
Destroy destroyed destroyed destroying Study studied studied studying
Lie 撒谎lied lied lying
Lie 位于，平躺lay lain lying Lay 放置，下蛋laid laid laying Die died died dying
Fly flew flown flying
常见形容词
Big大的bigger, biggest
Hot热的hotter hottest
Red红色的redder reddest
Thin廋的thinner thinnest
Fat胖的fatter fattest
Slim 苗条的slimmer slimmest
Wet湿的wetter wettest
Sad难过的sadder saddest。