52. installing ⇒ installed
53. tie ⇒ that was tied (ko chắc)
54. climbed ⇒ climbing
55. to fall ⇒ falling
56. go ⇒ going
57. enter ⇒ entering
58. run ⇒ running
59. buying ⇒ to buy
60. arrest ⇒ are arrested
61. will ask ⇒ ask
62. not have to ⇒ not having
63. many ⇒ much
64. learning ⇒ to learn
65.
66. writing ⇒ written