新人教选修七Unit1LivingwellGrammar动词不定式[课件]汇编.pptVIP

课文原句再现 1.Unfortunately,the doctors don’t know how to make me better. 2.I used to dream about playing professional football. 3….it is difficult to know what the future holds. 4.Sometimes I was too weak to go to school. 5.My ambition is to work for a firm. 6.I have a very busy life with no time to sit around feeling sorry for myself. 7.To look after my pets takes a lot of time. 8.I have to work hard to live a normal life. 不定式由“to+do”构成,其否定形式是“not/never to do”。不定式可以带宾语或状语构成不定式短语,没有人称和数的变化,但有时态和语态的变化。不定式可以作主语、宾语、状语、表语和定语，但不能单独作谓语。不定式的复合结构是“for + sb.+ to do” 。 一、不定式的构成 二. 不定式的时态与语态 主动语态 被动语态 一般式 进行式 完成式 不定式 to do to be done to be doing to have done to have been done ---------- 记住：动词不定式有“三式”和“两态” (1).They pretended not to see us. (2).He pretended to be sleeping. (3).She pretended to have known it before. (一般式表示与谓语的动作同时发生或发生在 谓语动作之后.) (进行式表示与谓语动作同时发生) (完成式表示发生在谓语动作之前) (4).It’s a great honor for me to be invited to do the voluntary work for the disabled. (被动式表示动作与其逻辑主语之间是被动关系) 1. 作主语 2. 作宾语 3. 作宾语补足语 4. 作定语 5. 作状语 6. 作表语 7. 作独立成分 8. 与疑问词等连用 三. 不定式的句法功能 1.To look after my pets properly takes a lot of time. 2.…it is difficult to know what the future holds. 3.It’s not right to make fun of the disabled. (1). 主语 单个不定式作主语时,谓语动词用单数 若不定式太长,常用it作形式主语,不定式置后. 1. My ambition is to work for a firm that develops computer software. 2. To see is to believe. (2). 表语 think/consider/find it + adj.+ to do 1....and a big company has decided to buy it from me. 2.I found it worthwhile to study psychology. (3) 宾语 常用动词不定式作宾语的动词有： hope, refuse, learn, set out, choose, decide, agree, manage, pretend, plan,etc. 若不定式太长,常用it作形式宾语,不定式置后. The teacher told me to clean the blackboard. I expect you to give me some help. (4). 宾补 五”看” watch see look at notice observe 三“使” let have make 二”听” listen to hear 一”感觉”: feel 半”帮”： help e.g. I made him do his work. He was made to do his work (by me). 注意: 1 help 后面的“to” 可以省去, 构成 : help sb. (to) do sth. 2不定式用在其余11个动词后面作宾语时， 主动语态的句子