高中英语必修三第四单元教案

(3,4)

重点词汇

1. n.[c] 系统；体系；制度；方法systematic adj 有系统的; 有条理的

[典例]

The solar system includes the sun and its eight planets.

[练习] 根据意思完成句子。

1). The ______ ______ (教育系统) operates very differently in the US and China.

2). He introduced us a well-designed ______ ______ (铁路系统).

2. vt. (laid, laid, laying) 把放下；摆设；铺(地毯) ；产(蛋)

[典例]

1). He laid his hand on my shoulder.

2). Who should we lay the blame on?

[重点用法] lay短语：

lay eggs 下蛋lay sth. aside 把某物放在一边；积蓄（钱）

lay sth. down 把某物放下lay the blame on sb.责备某人

lay the table 摆桌子lay emphasis / stress on sth. 把重点放在某事上；强调[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). The bird ______ its eggs in other birds’ nests.

2). He is a political leader that _____ _____ _____ _____ (非常强调) individual responsibility.

3). He ______ some money ______ for rainy days.

3.adj. 有害的；伤害的harm n.&vt. 伤害（某人）其反义词为harmless [典例]

There is no harm in doing sth./It does no harm to do sth.做某事是个好主意(或没有坏处)

①It is harmful to your health to drink too much.

②He may say no，but there’s no harm in asking.

[重点用法]

be harmful to sb./sth. 对……有害do harm to sb.= do sb. harm = harm sb. 对……有害；伤害……

[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). Everyone knows that smoking is ______ to your health.

2). In many cases, too much care for children from parents might even do ______ to their growth.

3). 在阳光下看书对你的眼睛伤害很大。

_______________________________________________________________________________ Doctors always tell us that drinking too much________our health，but some people don’t care. A．is harm to B．does harmful to C．is harmful to D．do harm to

4. vi. 存在；生存existence n. 存在

[典例]

1). Does life exist on Mars?

2). I can hardly exist on the wage I’ m getting.

[重点用法]

exist + prep. 存在于地方exist on sth. 靠某物生存

[练习] 用exist的短语或其适当形式填空。

1). This plant ______ only ______ Australia.

2). Can you ______ ______ such a low salary?

3). I doubt the ______ (exist) of alien.

5.vt.&vi. (使)迷惑；(使)苦思n.谜；难题puzzled adj.无法了解的；困惑的puzzling adj.令人费解的

[典例]

Their reason for doing it is still a puzzle to me.

①Her puzzled look on her face suggested she didn’t understand what I said.

②I have been puzzling about this question for weeks.

[重点用法]

sth. puzzles sb. 某事使某人迷惑/为难sb. be puzzled by sth. 某人对……感到迷惑

puzzle about/over sth. 对某事感到迷惑或苦苦思索（以便理解）puzzl e one’ s brain苦思苦想；绞尽脑汁

solve a puzzle 解决一个难题

[练习] 用puzzle的适当形式填空或翻译。

1). To explain the ________ (puzzle) findings, he offers two theories.

2). _______ _______ _______ (使我困惑的事情) is why he left the country without telling

anyone.

3). She listened with a _______ (puzzle) expression on her face.

4). No one has yet succeeded in explaining the _______ (puzzle) of how life began.

完成句子

She has lost heart since she failed in the exam.She_______________(对将来感到迷茫)．

6.v.拉，拖，拔；移动n.拉，拖；拉(引)力

[典例]

1). You push a nd I’ ll pull.

2). I felt a pull at my sleeve and turned round.

①He pulled the door open and rushed out.

②The police car signalled to us to pull in.

③We waved as the train pulled out of the station.

④The doctor told me that I would pull through.

[重点用法]

pull off (sth)（指机动车辆）驶离（道路）（至路侧停车处停下）