社会生活的信息化和经济的全球化，使英语的重要性日益突出。精品小编准备了英语高三必修五unit3说课稿，希望你喜欢。

核心单词

1. impression

n.印痕;印记;印象;感想

常用结构：

have an impression of sth./doing sth. 对(做)某事有印象

make an impression on sb. 给某人留下印象

make no impression on 对……无影响/效果

give sb.a favorable impression 给某人留下好印象

an impression of one’s foot 某人的脚印

Your performance gave me a strong impression.

你的表演给我留下了很深的印象。

What I said made no impression on him.

我的话对他不起作用。

联想拓展

impress v.留下印象

impress sth.on/upon one’s mind 把……牢记在心上

高手过招

单项填空

She spoke very confidently because she wanted to make a great            on her employer at the first time.

A. Influence                 B. pressure

C. Impression              D. Effect

解析:选C。make an impression on sb. 给某人留下印象。

2. lack

v.&n. 缺乏;缺少的东西

注意：lack作名词时，后常接of。lack作动词时，既可作及物动词，也可以作不及物动词，作不及物动词时，后常接for或in。lack不用于被动语态。

常用结构：

lack sth.                                  缺少某物

lack for sth.                            缺少;需要

for/through lack of...             因缺乏……

no lack of...                            不缺乏

a/the lack of ...                        ……的缺乏

He didn’t go there because he lacked courage.

他没去那里，因为他缺乏勇气。

The plant died for lack of water.植物因缺水而死。

They lacked for nothing.他们无所需求。

联想拓展

lacking adj. 匮乏的;不足的;没有的

be lacking in 缺乏(品质、特点等)

She seems to be lacking in common sense.

她似乎缺乏常识。

高手过招

(1)单项填空

Though            money, his parents managed to send him to university.                   (2010•01•陕西宝鸡检测)

A. Lacked                B. lacking of

C. Lacking               D. lacked in

(2)完成句子                                                           (原创)

①因为缺乏兴趣这次旅行被取消了。

The trip was cancelled through                              .

②他缺乏信心。

He                                   .

解析:(1) 选C。考查分词作状语。his parents与lack之间呈主谓关系，所以应用现在分词作状语;lack作动词时不与of搭配，所以答案选C。

(2)①lack of interest ②lacks confidence

3. sight

n. 视力;视觉;看见;光景，奇观;名胜

常用结构：

lose sight of                       看不见;忘记;失去

catch sight of sth./sb.       看见某物/人

at first sight                        初看之下;乍看起来

at (the) sight of                   一看见就……

out of sight                         看不见

be in sight                           看得见，在眼前

Out of sight, out of mind.  眼不见,心不烦。

Last summer we had seen the sights of Beijing.

去年夏天我们游览了北京的名胜。

Crusoe was frightened at the sight of a man’s footprint.

克鲁索看到一行人的脚印，他非常害怕。

高手过招

(1)单项填空

For miles around me there was nothing but a desert, without a single plant or tree              .

(2010•01•陕西商洛检测)

A. in sight                 B. on earth

C. at a distance            D. in place

(2)完成句子                     (原创)

我们失去了许多珍贵的动物。

We                                                several precious animals.

解析:(1) 选A。in sight为固定搭配，意为“看得到”;on earth用在疑问句或否定句中，用来加强语气，意为“究竟;到底”;at a distance意为“在远处”。

(2)have lost sight of

4. require

vt. 需要;要求;命令

常用结构：

require that+主语+(should)+动词原形    需要某人做某事

require sb. to do sth.    命令某人做某事

require sth.(of sb.)   要求(某人)某事

I will do everything that is required of me.

凡是要求我的事，我都会办到。

The situation requires that I(should)be there.

形势需要我去那里。

温馨提示

require后接宾语从句时，宾语从句必须用should do的虚拟语气，其中should可以省略。

另外，表示“需要”，且是物作主语时，后接动词 ?ing形式的主动形式表示被动含义，可以等于不定式被动形式;在这一点上，need和want用法相同。

The house requires mending.

=The house requires to be mended. 房屋需要维修。

All cars require servicing regularly.

所有汽车都需要定期检修。

They required him to keep it a secret.

他们要求他对这事保密。

高手过招

单项填空

①In competition, women are required          some of their exercises              music.(2010•01•山西平遥检测)

A. perform; to               B. to perform; to

C. performing; with          D. to perform; by

②All the people present agreed that the matter required            .             (2010•01•山西太原检测)

A. to look into                  B. being looked into

C. to be looked                D. looking into

解析: ①选B。be required to do sth.意为“被要求做某事”。第二个空的to是介词意为“随着，伴着”。

②选D。require, want, need表示“需要”，当其主语是动作的承受者时，其后的宾语常用动词不定式的被动形式或动名词的主动形式。