动词不定式小结

这两个女人认为这只狗杀死了这只兔子The two women thought that the dog killed the rabbit动词不定式小结To do 中的to是一个符号无实际意义，没人称数的变化。动词不定式和后边的名词等构成不定式短语，在句中可以用作主语 宾语 宾补 状语 （表语 定语）1， 做主语 it is +adj + for of sb(表示动词不定式是谁做的) to do sth 为了避免句子头重脚轻 可以用it作形式主语，真正主语是动词不定式短语 放在句子的后部例如 to be a doctor is hard It is hard to be a doctor It is not easy to learn English well Its important to plant treess in spring It is important for us to use English every day 作表语 动词不定式（短语）做表语常用语系动词之后His work is to drive a car 三作宾语动词不定式（短语）做宾语可以放在一些动词后边用作宾语begin start want forget remember show learn like hate love ask 等I want to tell you a story 我想给你讲个故事Dont forget to lock the door Would you like to go and have a picnic with us tomorrow ? and 连接2个动词不定式 第二个一般省去to He wants to go and have a swim with us (2)若宾语的动词不定式很长可用it作形式宾语I find it interesting to learn English with you .He found it hard to catch us with others 他觉得赶上别人很困难四 作宾补 动词不定式做宾补表示宾语所做的动作可以用动词不定式做宾补的动词有Tell ask want like invite encourage help teach sb to do sth 等但是在let make feel see watch hear feel notice have sb do sth等感官听觉视觉动词或使役动词后边做宾补的动词不定式都省略to ；可省可不省的 help sb (to)do ；动词不定式的否定直接在to前加notThe teacher asked us to read English for half an hour in the morning The teacher often tells jim not to spend too much time playing computer games Let me help you Let the boy not go 让那个男孩别走扩展 宾补的不定式的被动语态如果将主动语态变为被动语态时，做宾补的动词不定式变为主语补足语动词不定式则不省略to 即原来省的再加上去The boy made the baby cry The baby was made to cry by the boy 动词不定式做目的状语常放在句尾表目的，为了什么有时把不定式提前表强调目的还可用in order to 表强调To early English quickly and well ,he went to England 为了更好地学英语。他去了英国动词不定式做定语常用来修饰名词或不定代词，放在所修饰的词后 为后置定语Who was the first one to arrive ? 谁第一个到得？She has no paper to write on ? 他没有纸鞋子Do you have something to drink ? 你这有喝的吗注 动词不定式（短语）作定语修饰名词时 与其所修饰名词时一种动宾冠以。如果不定式中的动词为不及物动词时 其后应加上一个含以上所需要的介词 。例I have no chair to sit on He has no house to live in 动词不定式和疑问词连用可以做句子的主 宾 表 等The proble is where to get a computer 表语 No one knows how to do it 没有人知道如何做这件事 宾语I really dont know which one to choose 宾语When and where to have the party is not known 主语 何时何地举行联欢还不知道不定式和疑问词连用作宾语时有时可以改为宾语从句I dont know what to do next 我不知下一步做什么I dont know what I should do next