5. break down

1) 破坏；拆散

2)（机器）损坏 Our truck broke down outside town. 我们的卡车在城外抛锚了。

3) 失败；破裂 Their opposition broke down.他们的反对意见打消了。

4) 精神崩溃；失去控制 He broke down and wept. 他不禁失声痛哭。

5) 起化学变化 Food is broken down by chemicals. 化学物质引起食物转化。

· 重点句型解析 ·

1. I should be home in about ten minutes. 再过大约十分钟，我应该到家了。

should 在此的意思为"应该"，但在不同的语境中should有不同的含义，

2. Modern cellphones are more than just phones-they are used as cameras and radios, and to send e-mail or surf the Internet.现代的手机不仅仅是电话机-它们也当坐照相机和收音机使用，还可以发送电子邮件和上网。

1）use A as B 把A用作B。

2）use sth to do sth用某物来做某事。

3. The answer seems to be that we have a need to stay in touch with friends and family nomatter where we are or what we are doing.答案似乎是：无论我们在何处或正在做什么，我们都需要和朋友以及家人一直保持联系。

1) seem 似乎，好像，其用法及搭配有：

seem + adj.,

2）seem to do

3）It seems that...,

4）It seems as if...,

5) no matter无论，不管，后面常跟疑问词引导的从句，其意相当于疑问词后加ever。如 no matterwhat=whatever; no matter where=wherever; no matter how=however; no matter

when=whenever

3. She says that her cellphone helps her do whatever she wants to do.她说她的手机能让她想做什么就做什么。

1）whatever无论什么，不管什么，在句中用作连接代词，引导名词性从句。

　2）类似用法的词还有：whoever, whomever, whichever等。

·高考衔接点拨·

　　make

　　1、make + n.

make laws制订法规, make friends交友, make research研究, make progress取得进步, make great effort竭尽全力, make contribution做出贡献, make war发动战争, make peac