89．AIDS

Each day, more than 6,000 people around the world fall victim to HIV. That's how serious the problem is. The World Health Organization has estimated that about 17 million people have already been infected with this disease. The news is that the virus is now spreading fastest in Asia. It's high time some steps were taken.

　　Two proven methods should be followed. One way is to teach people how to avoid catching the virus sexually through condom promotion. The other way is to encourage people to stop having casual sex. A word to the wise is sufficient, so don't take this warning lightly.

【Grammar 语法】

① It's high time that …. 虚拟语气

It's high time some steps were taken.= It's high time that some steps were taken.

期中 that 可以省略 ，it’s + adj +that 引导的 过去式名词从句 的句型表示 现在该是…的时候了 ，表示的是与现在事实相反的虚拟语气 ，因此 之后的 动词一律用过去式 ，be动词 一律用 were 句型如下it is （high about）time that …..

例句：it is （high about）time that you got a haircut .

it is （high about）time that you got married.

① Two proven methods should be followed. One way is to teach people how to avoid catching the virus sexually through condom promotion. The other way is to encourage people to stop having casual sex.

此句中 使用了 one …the other….（一个…另一个…）的 句型。使用本句型时 ，通常前 前置two +名词复数 表示限定两者中的 一个 和 另一个， one …the other 还可以做 代词 单独使用 或作形容词用 其后置 名词

例句 two people came to see her today. one was an old man ；the other was a pretty girl .

注意 a

若指 限定的三者时 ，则使用 one … another …the other…（一个…一个…另一个…）

例句 I have three cars .one is black ，another is yellow ，the other is pink.

注意b

One … the others （一个 ..其余..） 用于 限定 三者以上的 句型

例句：the test this morning was really tough .only one student passed it；the others all failed

注意c

Some …others … （一些…另一些…）用于 非限定性的两个群体

例句 some dogs are friendly but others are fierce .

注意d

Some… others …still others…（一些 …一些…而 另一些…） 用于 非限定性的 三个群体

It was so hot that some runners slowed down ，others stopped ，and still others fainted .

注意 e

Some …the others..（一些 …其余…）指用于 限定的一个群体

例句 some of these grapes are sweet but the others are sour .

②此处做 师生 句型练习

One way is to teach people how to avoid catching the virus sexually through condom promotion.

不及物动词 后+doing做 宾语 而不是 to do

例如 avoid admit （deny 否认 ）enjoy consider practice escape risk quit（ resent 讨厌 ）suggest mind

【Substitution 替换练习】

① It's high time some steps were taken.

It’s time that my son learned how to behave more maturely

It’s about time that someone pointed out his mistake to him.

②Two proven methods should be followed. One way is to teach people how to avoid catching the virus sexually through condom promotion. The other way is to encourage people to stop having casual sex.

One car ran into the truck and the other hit a tree （一辆车 装上的卡车 ，另一辆装上了树）

One thief shot the shopkeeper and the other ran away.

......................以上为本节 复习内容...............................

来源:可可英语 http://www.kekenet.com/Article/201106/138817.shtml