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he door and then continued writing the letter.11. be used to do “被用來做某事” 如 Dictionaries are used to look up words. be used to doing “習慣于做某事” 如 He is used to exercising in the morning. 后接不定式表示設法去做某事,接動名詞表示做某事試試(看有何效果)。如 When I was writing a letter, someone knocked at the door. I opened the door and then went on writing the letter (= …went on with the letter).10. continue to do “繼續(xù)做某事”,指做不同的事。9. go on to do “繼續(xù)做某事”,指做不同的事。如 The train is beginning to leave.○3當begin后接表示心理活動的動詞(如think, understand, know)時。如 The baby began crying hard. 而在下類情況下只用begin to do, 不用begin doing:○1當主語是物時。2. remember to do “記得要去做某事” 如 She remembered to see her parents the next day. remember doing “記得做過某事” 如 I remembered meeting her yesterday.3. forget to do “忘了要去做某事” 如 They always forget to have lunch when they are busy. forget doing “忘了做過某事” 如 I forgot phoning Tom, so I phoned him the second time. 4. try to do “試圖(盡力)做某事” 如 He tried to catch the early bus and he got on it at last. try doing “試圖(試著)做某事” 如 I tried getting on well with the new students.5. mean to do “打算做某事” 如 Jack meant to help others. mean doing “意味著做某事” 如 Drinking means wasting your life.6. need to do “需要做某事” (主語必須是人) 如 We need to have a rest. need doing “需要做某事”(主語必須是物) 如 The bike needs mending. ( = The bike needs to be mended)7. want to do “想要做某事” (主語必須是人) 如 We want to have a rest. want doing “想