80. to stop to do smt ( dừng lại để làm gì ) Ex: we stopped to buy some petrol. 81. to stop doing smt ( thôi không làm gì nữa ) Ex: we stopped going out late. 82. to need to do smt ( cần làm gì ) Ex: you need to work harder. 83. to need doing ( cần được làm ) Ex: this car needs repairing. 84. try to do ( cố làm gì ) Ex: we tried to learn hard. 85. try doing smt ( thử làm gì ). Ex: we tried cooking this food. 86. to remember doing ( nhớ đã làm gì ) Ex: I remember watching this film.87. remember to do ( nhớ làm gì ) ( chưa làm cái này ) Ex: remember to do your homework. 88. to be busy doing smt ( bận rộn làm gì ) Ex: we are busy preparing for our exam. 89. to apologize for doing smt ( xin lỗi ai vì đã làm gì ).Ex: I want to apologize for being rude to you. 90. to rely on smb ( tin cậy, dựa dẫm vào ai ) Ex: you can rely on him.