必修四第一单元

1．alternative adj. 替换的；供选择的n. 可供选择的事物

(1)have no alternative/choice but to do sth.别无选择只好做某事

An alternative to ... ……的替代品

(2)alternatively adv. 可供选择地

②The way was blocked, so we went by an alternative road.

③I had no alternative but to report him to the police.除了向警察举报他，我别无选择。

2. for sure: 肯定地

4. rely vi

rely on 依赖，依靠，信赖+ n./ doing= depend on

1)+ n. / 代

You may not rely on the weather report.

They rely on themselves, which is much better.

2) + 不定式复合结构“指望某人会做，相信某人会做”

You can rely on Peter to do what he promises.

3) + 动名词复合结构“指望某人会做，相信某人会做”

I rely on her paying back the money. = I rely on her to pay back the money. 4）rely on it that + 从句“相信…，指望…”

We may rely on it that he will finish the project on time.

5.limit n. 常用复数，“界限，限度，边界线范围”

e.g. His patience reached its limit.set a limit to 限制……

e.g. set a limit to the number of passengers.

Vt. 限制，限定limit ….. to …..

You should limit your speech to fifteen minutes.

形容词：limited 有限的，不充分的limitless 无限的，无限制的6．command n. 命令；指令；(常用于军队)指挥；控制

v．命令；指挥；掌握，支配

(1)at sb.'s command听某人支配

[巧学助记]

常用(should)＋do构成虚拟语气的动词口诀：

一坚持：insist

二命令：order, command

三建议：advise, suggest, propose

四要求：request, require, demand, desire

7．charge n．费用；价钱；主管，负责

v.装满；控诉；收费；充电

（1)take charge of掌管/负责……

in charge of 控制/管理……

in/under the charge of 受……的管理

free of charge ＝for free 免费

(2)charge sb. for sth. 为某物向某人收取费用

charge sb. with (doing) sth. 控告某人(做)某事

9. shape. Vt. 造成……形状；塑造

n. 形状，状况；外形