人教版(2019)选择性必修第三册Unit 1 Art Grammar 不定式用法课件(20张ppt)

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名称 人教版(2019)选择性必修第三册Unit 1 Art Grammar 不定式用法课件(20张ppt)
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资源类型 教案
版本资源 人教版(2019)
科目 英语
更新时间 2022-08-30 11:46:08

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(共20张PPT)
非谓语动词之
动词不定式to do的用法
关于动词的那些事(思维导图)
动词
谓语动词
(作谓语)
非谓语动词
(作主宾表定状补)
to do
doing
done
do/ does/ did
举办2022年冬季奥运会是我们国家巨大的荣幸。
To host the 2022 Winter Olympics is a great honor for our country.
作主语
非谓语动词之to do的句法功能
习近平主席决定宣布冬奥会开幕。
President Xi decided to declare the 2022 Winter Olympics open.
作宾语
Everyone seemed to be satisfied with the opening ceremony of 2022 Winter Olympics.
每个人似乎都对这次的开幕式很满意。
作表语
The Beijing Winter Olmpics will open on February 4,2022, which will feature 7 sports, 15 disciplines and 109 events.
In the following 16 days, there will be 109 events to be enjoyed.
在接下来的16天里,我们将看到109个精彩的项目。
作定语
To win the competition, the competitors have to practice hard day and night.
为了赢得比赛,运动员们不得不没日没夜地练习。
作状语
课前自主扫描
一、形式
主动语态 被动语态 意义
一般式  
完成式  
进行式 \  
完成 进行式 \  
to do
to be done
to be
doing
to have
done
to have
been done
to have
been doing
表示动作与谓语动作同时发生或发生在谓语动作之后
表示动作发生在谓语动作之前
表示谓语动作发生时,不定式动作正在进行
表示动作发生在谓语动作之前且一直持续到谓语动作发生时,仍在进行
二、用法
1. 用来解释说明主语的内容。
做主语的名词常见的有aim、suggestion、 duty、 hope、 idea、 intention、 plan、 purpose、 the way等。
eg:The duty of the police is to keep us safe.
警察的职责是保护我们的安全。
2. what 引导的名词性从句。
eg:What I would suggest is to ask your father for his opinion.
我的建议是征求你父亲的意见。
3. 用于被动语态,相当于can/could、 should、 ought to、 must。
eg:The rules are to be obeyed.
规则必须遵守。
eg:You are to be rewarded.
你应受奖励。
4. 表示 “同意、安排、命令、决定、劝告、愿望、意愿、禁止”等。
eg:They are to marry next week.
他们将在下周结婚。
eg:You are to finish your homework on time.
你必须按时完成作业。
5. 不定式(短语)作表语时,可用主动形式表示被动意义。
eg:Who is to blame for the fire
谁该对此次火灾负责?
eg:The house is to let.
该房屋出租。
6. “疑问词+不定式” 作表语
eg:My question is where to find the answer.
我的问题是在哪里可以找到答案
eg:The question is how to get there.
问题是如何到达那。
我们生活中最大的挑战是如何在没有朋友的情况下生存
The biggest challenge in our life is how to survive without friends
三、不定式作表语省略to的情况
1. all作主句主语,其后的定语从句中含有实义动词do的某种形式时。
eg:All you need to do is finish the homework.
你现在要做的就是完成这个作业。
有 do 无 to
2. what引导的从句作主语,从句中含有实义动词do的某种形式时。
eg:What I want to do is take a holiday right away.
我想马上就去度假。
Practice ~
1、What the boys' parents told them just now was _________(not play) in the street. It was too dangerous.
not to play
2、What we need to do at this critical moment is __________(stay) at home and not meet people face-to-face.
(to) stay
3、What he wanted to do before going to school was _________(finish) his homework.
(to) finish
3. 主语被the only、the first、last或形容词最高级修饰, 主语后有定语(从句), 且定语(从句)中含有do的某种形式时。
eg:The first thing to do now is study.
现在要做的第一件事就是学习。
The first thing that we should do now is study.
晚上他唯一做的就是看报纸。
In the evening the only thing he did was read the newspaper.
四、不定式作表语和V ing作表语的区别
1. 主表一致。
eg:To see is to believe.
眼见为实。
= Seeing
is believing.
2. 不定式表达一次性的;特定的;将来的动作,强调动作。
V-ing指经常性的动作;说明动作的名称。
(1) My job is ________(look) after the old in the nursing home.
(2) My job now is ________ (take) care of my injured brother at home.
looking
to take