3、状语从句 　在复合句中起状语作用的从句叫做状语从句。状语从句可分为时间状语、地点状语、原因状语、目的状语、结果状语、条件状语、行为方式状语、比较状语、让步状语等多种。

　例2，Let's go out for a walk, _______ ? 　A. will you 　B. won't you 　C. shall we 　D. do we 　解析：该题答案为C，let's…后加上shall we来表语气婉转、客气，而在let us后加上will you。 　例3，He hardly writes to you, _______ ? 　A. doesn't he 　B. does he 　C. do they 　D. has he 　解析：该题答案为B，hardly否定副词，反问部分要用肯定形式。

(十二)各种从句

(十一)句子种类

英语语法知识难点(三) (十)情态动词与助动词

　现在分词的句法功能。 　1、作状语 　Seeing from the top of the mountain, I found the city was beautiful. 　Walking along the street, they suddenly saw him. 　2、作宾语 　I hate being spoken ill of. 　He considered visiting Japan during the winter vocation. 　3、作表语 　Seeing is believing. 　The book is interesting. 　4、作宾语补足语 　I noticed him crossing the street. 　Mother caught him smoking in the kitchen. 　5、作定语 　Do you know the man writing a letter? 　The worker running a machine is my brother.

　分词使用中的几个问题 　1、现在分词的完成式 　Having cleaned the room, I went out. 　2、现在分词的否定式 　Not having received any letter, he felt a little worried. 　3、现在分词与过去分词的不同 　现在分词表示主动、正在，过去分词表示被动、完成 　I found the man killed there. 　I found the man standing there. 　4、have结构 　We have the car repaired. 　We have repaired the car. 　We have Tom repair the car. 　We have Tom repairing the car the whole morning. 　5、分词作表语 　We were excited at the news. 　The football game is exciting. 　6、独立主格结构 　It being a fine day, we went out to visit the park.

(九)分词

　否定式 not +动名词 　2、 动名词的用法 　(1) 作主语 　Playing football is my favorite sport. 　Travelling with friends at weekend is fun. 　作主语的动名词结构复杂且长时，可用it作形式主语。如： 　It is fun travelling with friends at weekend. 　(2) 作宾语 　I enjoy playing PC game. 　He gave up writing five years ago. 　(3) 作表语 　What he hated most was doing nothing. 　Seeing is believing. 　动名词作表语时，句子的主语常是无生命名词或what引导的名词性从句。 　(4) 作定语 　There's a dining room in my school. 　All the people watching laughed. 　(5) 动名词的复合结构"物主代词(或名词的所有格)+动名词"。如： 　Tom's going home late made her mother angry. 　Would you mind my opening the window? 　不过，动名词的逻辑主语在遇到以下情况时，必须用名词的普通格(或人称代词的宾格)。 　①无生命名词 　The girls were afraid of the door suddenly closing. 　Fire burns better by oxygen being at work. 　②有生命名词，但表泛指。 　Have you ever heard of girls smoking? 　③两个以上的有生命的名词并列。 　Do you still remember my parents and me coming to see you that day?

3．后面常接动名词的动词和短语 　mind, enjoy, finish, consider, practise, magine, 　keep, suggest, advise, allow, permit, 　be worth doing, be used to doing, be busy doing, 　can't help doing, it is no good doing, it is no use doing, 　look forward to doing, stick to doing, pay attention to doing, 　devote to doing, lead to doing

　例3 A new factory is ____ very soon. 　A to be built B built 　C to build D to building 　解析：该题选A。is to be built意为"将要被建"。

(八)动名词

2、 不定式的句法功能 　(1) 作主语 　To hear from you is nice. 　To be a good teacher is not easy. 　不定式作主语时，为了保持句子的平衡，往往以it作形式主语，而不定式置于谓语动词后。如：It's nice to hear from you. 　 It's not easy to be a good teacher. 　(2) 作宾语 　通常用于want, hope, wish, like, need, hate, begin, start, remember, agree, learn, pretend, refuse, manage, help等词后。如：I forgot to lock the door. 　　　　　　　　　　　 Please remember to write to me. 　(3) 作表语 　My job is to pick up letters. 　He seemed to have heard nothing. 　(4) 作定语 　不定式作定语时，须放在它所修饰的名词或代词后。如： 　I have two letters to write. 　I have a lot of work to do. 　(5) 作宾补 　通常用于want, wish, ask, order, tell, know, help, advise, allow, cause, force等词后。如： 　He ordered her to leave at once. 　He was forced to obey his order. 　(6) 作状语 　He got up early to catch the first bus. 　He worked hard to catch up with the other students. 　(7) 作独立成分 　To tell you the truth, I told a lie. 　(8) "疑问词+不定式"结构。 如： 　I don't know how to choose them. 　I cannot decide where to go. 　(9)不定式的否定式。如： 　I decided not to go. 　(10)不定式的完成式。如： 　He seemed to have cleaned the room before I came in. 　The boy is said to have been sent to the hospital last week.

　(11)too…to 结构。如： 　He was too excited to go to sleep. 　He was only too glad to go. (他太高兴了，乐意去) 　(12)主动表被动。如： 　The book is easy to read. 　I have a book to read.

(七)动词不定式