［误］ Do you like to go with us?
［正］ Would you like to go with us?
［析］ Do you like…问的是习惯，如：Do you like swimming? 而would you like是一次性的邀请。
［误］ I am used to get up early in the morning.
［正］ I am used to getting up early in the morning.
［析］ used to 共有三种用法，① 表示过去的习惯，如：I used to live with my parents. ② 表示过去的习惯延续到现在，如：I am used to swimming in the river. ③ 用于被动语态，如：Oil is used to cook.
［误］ To play with the children are very interesting.
［正］ To play with the children is very interesting.
［析］ 不定式作主语时，应视为单数主语，特别是两个不定式用and作连词作主语时，如指的是一件事也应用单数谓语动词。如：To get up early and to go to sleep early is good for your health.
［误］ He asked me do my homework alone.
［正］ He asked me to do my homework alone.
［析］ 某些动词要求不定式作其宾语或宾语补足语，它们是：ask somebody to do something 要求某人做某事。tell somebody to do something 告诉某人做某事 还有prepare 准备，decide 决定，happen to 碰巧，seem 似乎。
［误］ he told me to drive a car.
［正］ He told me how to drive a car.
［析］ 要学会疑问词加不定式的用法，特别要注意的是what是疑问代词，而how是疑问副词。如：I want to know what to do. (我想知道干什么)。I want to know how to do it. (我想知道如何去作)。要注意的是how to do it 中的it是不可少的，因how是疑问副词，不能作及物动词的宾语，而what是疑问代词，可做do的宾语，所以what to do 后不要加it。
［误］ I am very glad meeting you.
［正］ I am very glad to meet you.
［析］ 许多形容词后加不定式，这样用时形容词多是用来描述人物的感情、态度，如：glad, happy, pleased, lucky, sorry, sad, upset, ready, careful, surprised。
［误］ I'm too glad for seeing you.
［正］ I'm too glad to see you.
［析］ 这句话不能按照too…to的句型翻译为：我太高兴了以至于不想见你。而应译为：见到你太高兴了。又如：She is too honest to tell the truth. 应译为：她很诚实，不会不讲实话。
［误］ Tom is too young not to join the army.
［正］ Tom is too young to join the army.
［析］ 这是too…to的正常用法，太如何如何以至于不能如何。
［误］ I went to the hospital for seeing my old friend. He was ill in hospital.
［正］ I went to the hospital to see my old friend. He was ill in hospital.
［析］ 在句中表示某动作的目的时，要用不定式而不能用for加动名词。
［误］ Could you help me to find a chair to sit.
［正］ Could you help me to find a chair to sit on.
［析］ 当不定式作后置定语时，将不定式放于名词之后。如果不定式中的动词是不及物动词，则其后面的介词不要省略。如：I sat on the chair. 这样的用法还有：I want to find a room to live in. I want to find a pen to write with.
［误］ When mother was about leaving the baby cried suddenly.
［正］ When mother was about to leave the baby cried suddenly.
［析］ be about to 是表达较近的即将发生的动作，可用来表示将来时，或按计划、安排的事。
［误］ This work is difficult to be done.
［正］ This work is difficult to do.
［析］ 在不定式作宾语时，下列情况常用主动语态表示被动。① 句子的主语即是不定式动作的执行者，如：I have a lot of letters to write. ② 句中的宾语是不定式中动作的执行者，如：Could you find me a job to do? ③ 在形容词之后的不定式，如：English is difficult to learn.
［误］ Would you like to see a film with us? Yes, I'd love.
［正］ Would you like to see a film with us? Yes, I'd love to.
［析］ 在口语简答语中要将不定式符号保留，如：I had to (不得不作) I'm going to (打算作) I used to (过去习惯作) I'd love to (喜欢作) I hope to (希望作某事) I'll be glad to (高兴作)
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