非谓语动词的用法总结归纳（英语“非谓语动词”用法小结）
非谓语动词是中学阶段英语测试的核心考点之一，也是广大学生最难掌握和实际运用的模块，其占比大，难度系数高！
英语中的“非谓语动词”包括四个部分，即现在分词(V-ing)、动名词(V-ing)、过去分词(PP)以及动词不定式(to do)。
顾名思义，非谓语动词不能在句子中作谓语成份，它在句子中可以作“主语、宾语、表语、状语、定语”等。
【动词不定式的基本用法】
第一、基本形式：to + 动词原形，有时可以不带to。
动词不定式，表示“主动、将来”，即该动作尚未发生，或者该动作和主语之间是主动关系。
第二、否定形式：not to + 动词原形，即在不定式符号to前面加not。
动词后跟不定式的单词有：ask, decide, hope, want, agree, choose, wish, would like等。
第三、动词不定式可以在句中作：主语、宾语、宾补、定语、状语等。
【注意】
- 动词不定式作目的状语，表“为了…”。目的状语可以位于句子开头，也可以位于句末。
- 动词不定式作主语时，为避免头重脚轻，可把句子改为用it作形式主语，动词不定式短语作真正主语的句子。
(1)作状语：To catch the early bus, Tom got up at 5 AM this morning.
(2)作状语：He is spending a lot of time on study these months in order to pass the Senior high school entrance examination.
(3)作宾语：He decides to have a birthday party next week.
(4)作宾补：My parents allow me to ride my bike in the park.
(5)作主语：To go to school on time is a good habit.
=It is a good habit to go to school on time.
(6)作主语：It is necessary for us to protect the natural environment.
*to do sth = in order to do sth：“为了…”
第四、动词不定式可以和what, how, when, where, which等疑问词连用，可以作主语、宾语、宾语等成份。
(1)作主语：How to finish the project on time is a problem for us.
(2)作宾语：She doesn't know what to do next.
(3)作宾补：I will call you later to tell you when to come to my party.
第五、一些动词后用作宾补的不定式常常不带to，这种动词分两类：一类是感官动词，如see，hear；一类是使役动词，如let，make等。常见短语有：
1.see sb do sth：看见某人做了某事
2.see sb doing sth：看见某人正在做某事
3.hear sb do sth：听见某人做了某事
4.let/make sb do sth：让某人做某事(强调一次性动作)
(1)I saw her eat her breakfast.
(2)Let's consider some ways of making study easier.
(3)My mom had me clean my bedroom yesterday.
