易错点整理：动词变形
1. dig-dug-dug-digging
2. spread-spread-spread-spreading
3. cost-cost-cost-costing
4. occur-occurred-occurred-occurring-occurrence
5. burst-burst-burst-bursting
6. awake-awoke-awoken
7. wake-woke-woken
8. bite-bit-bitten-biting
9. blow-blew-blown
10. break-broke -broken
11. understand-understood-understood
12. fall-fell-fallen
13. shake-shook-shaken
14. hear-heard-heard
15. stick-stuck-stuck
16. strike-struck-struck/stricken
17. write-wrote-written-writing
18. destroy-destroyed-destroyed
19. rise-rose-risen
20. arise-arose-arisen
21. sit-sat-sat
22. lie(躺)-lay-lain-lying
lie(撒谎)-lied-lied-lying
lay(放置下蛋)-laid-laid-laying
23. speed-sped-sped-speeding
24. freeze-froze-frozen
25. begin-began-begun-beginning
26. panic-panicked-panicked
27. drive-drove-driven-driving
28. fly-flew-flown-flying
29. prefer-preferred-preferred-preferring
30. permit-permitted-permitted-permitting
31. refer-referred-referred-referring
32. plan-planned-planned-planning
33. stop -stopped-stopped-stopping
34. equip-equipped-equipped
35. control-controlled-controlled
36. admit-admitted-admitted
37. submit-submitted-submitted
38. commit-committed-committed
39. regret-regretted-regretted
40. knit-knitted-knitted
41. hit-hit-hit-hitting
42. hurt-hurt-hurt-hurting
43. broadcast-broadcast-broadcast
44. let-let-let-letting
45. put-put-put-putting
46. read-read-read-reading
47. rid-rid-rid-ridding
48. set-set-set-setting
49. shut-shut-shut-shutting
50. forget-forgot-forgotten
51. try-tried-tried-trying
52. cry-cried-cried-crying
53. reply-replied-replied-replying
54. swim-swam-swum-swimming
55. eat-ate-eaten-eating
56. hug-hugged-hugged-hugging
57. forbid-forbad/forbade-forbidden-forbidding
58. catch-caught-caught
59. teach-taught-taught
60. become-became-become
61. come-came-come
62. bring-brought-brought
63. buy-bought-bought
64. fight-fought-fought
65. think-thought-thought
66. seek-sought-sought
67. feel-felt-felt fall-fell-fallen
68. keep-kept-kept
69. leave-left-left
70. sweep-swept-swept-sweeping
71. weep-wept-wept-weeping
72. drink-drank-drunk
73. sing-sang-sung
74. ring-rang-rung
