人教版英语八年级下册Unit2 SectionA Grammar Focus-4c课件
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例句：他的梦想是在不久的将来出国学习。 His aim is to study abroad in the near future．
不定式作定语应放于被修饰词之后。
例句：我想吃点东西。 I want to have something to eat. 他是第一个到教室的。 He is the first to come to the classroom.
动词不定式作主语时，常用it作
形式主语，而将不定式放在后面作真 正的主语。
例句：学外语很有用。 It’s very useful to learn foreign languages.
主语+谓语V. + to do
不定式常出现在一些及物动词后，常见的 及动词有expect,want , plan , agree , learn， decide,choose等
want, teach, allow, promise, order, advise,
expect, wish, invite, encourage 等。
例句：他们请他在宴会上唱一首流行歌曲。 They asked him to sing a pop song at the party.
动词+sb +(to )do sth
例句：I want to talk with you. 我想和你谈谈 She has decided to leave . 她决定要离开 We plan to have a picnic on the hill. 我们计划 去山上野餐
动词+sb +to do sth
常接不定式作宾语补足语的词有tell, ask,
一感(feel)二听(listen to, hear) 三让(let, make, have )四看(look at, see, watch, notice)， 半帮助(help)(即在动词 help 后面作宾语补足语时，to可有可无)”。
不定式充当表语常置于be动词之后，补充说明 主语,常用于以下结构：My job/ dream/goal/aim/duty is…
I’m making some signs to put up around the school. make…to do
1. 动词不定式的概述
不定式是一种非谓语
动词形式，可以在句中 作主语、宾语、宾语补 足语、定语和状语等。
2.动词不定式的用法
动词不定式的基本形 式是“to+动词原形”，
常写作to do(有时to可 以省略)，否定形式为 not to do。
don’t practice.
3. Mike taught his grandpa how _to__u_s_e (use) the
computer.
4. Mr. Smith helped the young man t_o__fi_n_d_ (find)
a job.
5. The students decided _to__w_o_r_k_ (work) out the
ask sb. to do You could ask hospitals to let you visit the kids and cheerletht esmb. udpo.
volunteer…to do She volunteers there once a week
to help kids learn to read. help sb. do learn to do
to help kids learn to read.
around the school.
Grammar focus
Please underline the infinitiveke to do I’d like to help homeless people.
decide to do She decided to try out for a volunteer
after-school reading program.
Mario believes it can help him to get his future dream job. help sb. to do
You could ask hospitals to let you Mario believes it can help him to get
visit the kids and cheer them up. his future dream job.
She volunteers there once a week I’m making some signs to put up
动词不定式可表示目的，原因，结果，位于句首 或句尾。
例句：她提高了她的声音，以便听得更好。 She raised her voice to be heard better．
他将去车站见他的朋友。 He will go to the station to meet his friends.
1. My brother wants _t_o_b_e_ (be) a pilot. 2. You’ll never learn _to__r_id_e_ (ride) a bike if you
Grammar focus
the homeless “无家可归的人”
adj. 无家可归的; -less表示“没有；无”
I’d like to help homeless people.
She decided to try out for a volunteer after-school reading program.
使役动词（let, make,have）和感 官动词（feel, hear, see, watch, notice, look ）时，to 要省略。 例句：半小时前我看见她离开了。 I saw her leave half an hour ago.
help后的不定式可省略to，也 可以带上to 例句：我哥哥经常帮助我做家务。 My brother often helps me (to) do the housework.
不定式作定语应放于被修饰词之后。
例句：我想吃点东西。 I want to have something to eat. 他是第一个到教室的。 He is the first to come to the classroom.
动词不定式作主语时，常用it作
形式主语，而将不定式放在后面作真 正的主语。
例句：学外语很有用。 It’s very useful to learn foreign languages.
主语+谓语V. + to do
不定式常出现在一些及物动词后，常见的 及动词有expect,want , plan , agree , learn， decide,choose等
want, teach, allow, promise, order, advise,
expect, wish, invite, encourage 等。
例句：他们请他在宴会上唱一首流行歌曲。 They asked him to sing a pop song at the party.
动词+sb +(to )do sth
例句：I want to talk with you. 我想和你谈谈 She has decided to leave . 她决定要离开 We plan to have a picnic on the hill. 我们计划 去山上野餐
动词+sb +to do sth
常接不定式作宾语补足语的词有tell, ask,
一感(feel)二听(listen to, hear) 三让(let, make, have )四看(look at, see, watch, notice)， 半帮助(help)(即在动词 help 后面作宾语补足语时，to可有可无)”。
不定式充当表语常置于be动词之后，补充说明 主语,常用于以下结构：My job/ dream/goal/aim/duty is…
I’m making some signs to put up around the school. make…to do
1. 动词不定式的概述
不定式是一种非谓语
动词形式，可以在句中 作主语、宾语、宾语补 足语、定语和状语等。
2.动词不定式的用法
动词不定式的基本形 式是“to+动词原形”，
常写作to do(有时to可 以省略)，否定形式为 not to do。
don’t practice.
3. Mike taught his grandpa how _to__u_s_e (use) the
computer.
4. Mr. Smith helped the young man t_o__fi_n_d_ (find)
a job.
5. The students decided _to__w_o_r_k_ (work) out the
ask sb. to do You could ask hospitals to let you visit the kids and cheerletht esmb. udpo.
volunteer…to do She volunteers there once a week
to help kids learn to read. help sb. do learn to do
to help kids learn to read.
around the school.
Grammar focus
Please underline the infinitiveke to do I’d like to help homeless people.
decide to do She decided to try out for a volunteer
after-school reading program.
Mario believes it can help him to get his future dream job. help sb. to do
You could ask hospitals to let you Mario believes it can help him to get
visit the kids and cheer them up. his future dream job.
She volunteers there once a week I’m making some signs to put up
动词不定式可表示目的，原因，结果，位于句首 或句尾。
例句：她提高了她的声音，以便听得更好。 She raised her voice to be heard better．
他将去车站见他的朋友。 He will go to the station to meet his friends.
1. My brother wants _t_o_b_e_ (be) a pilot. 2. You’ll never learn _to__r_id_e_ (ride) a bike if you
Grammar focus
the homeless “无家可归的人”
adj. 无家可归的; -less表示“没有；无”
I’d like to help homeless people.
She decided to try out for a volunteer after-school reading program.
使役动词（let, make,have）和感 官动词（feel, hear, see, watch, notice, look ）时，to 要省略。 例句：半小时前我看见她离开了。 I saw her leave half an hour ago.
help后的不定式可省略to，也 可以带上to 例句：我哥哥经常帮助我做家务。 My brother often helps me (to) do the housework.