- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
4.作宾语补足语
【注意】在感官动词(see, hear, feel, listen to , notice, watch, observe等)和使役动词(let, have, make )后的补足语中,不定式不带to。但这类 句子变成被动语态时,必须带to。
I saw him play in the park.
I think it necessary to report the thing to the teacher.
I find it interesting to work with him.
百度文库
C.动词不定式还可以用作介词宾语,但仅限于 介词except和but(除了)。 ❖常用句型有: There is nothing to do but+动词原形 do nothing but+动词(除做….之外别无选择) can but+动词原形 (只能原形(“只有做……) have no choice but to do ,只得) cannot help/choose but+动词原形(不能不……)
2.作宾语
A.动词后直接不定式作宾语的动词有许多,如 want, decide, intend, fail, wish, export, pretend, choose等等。
I mean to go there at once. B.不定式短语作宾语时,如果还带有宾语补足语,
往往把不定式短语放在宾补之后,而用it作形式 宾语。句型为“主语+find (feel, think, believe, consider, etc) +it+形容词/名词+to do sth”。
动词不定式的基本用法归纳
一、动词不定时的形式
❖肯定式:to do sth ❖否定式:not to do sth. ❖ 被动式:to be done ❖完成式:to have done
二、动词不定式的用法
1.作主语
A. 动词不定式作主语,谓语动词用单数形式。 如:
(1)To see is to believe.
(2)To master English gives us much help in the study of sience. B. 不定式或不定式短语作主语时,常用it作形 式主语,构成“It is + 形容词(+for sb.)不定式” 结构。
It is impossible for him to give up smoking.
→He was seen to play in the park.
The boss made those men work day and night.
→Those men were made to work day and night.
3.作表语和宾语不足语
❖ 动词不定式作表语,一是主语有不定式充当;二是 主语由抽象名词充当。
To teach is to learn. My job is to help the patient. 【注意】如果在主语中(通常在主语从句或修饰主语 的定语从句中)又实意动词do时,作表语的动词不 定式省略to。 All I want to do now (What I want to do now) is fill my stomach.