2．disadvantage n．不利条件，不便之处

Think about the advantages and disadvantages of each form of transport and fill in the following chart.(P17)

考虑一下各种交通方式的有利和不利条件然后填入下列图表中。

It is a disadvantage not to be able to drive a car.

不会开汽车是不便的。

It put him at a great disadvantage.

这使他处于极其不利的地位。

①at a disadvantage处于不利地位

under disadvantage在不利的情况下

②advantage n．优势，优点，好处

take advantage of利用

Sato was at a disadvantage.佐藤处于不利的地位。

They labored under the disadvantage of not having enough money.他们苦于得不到足够的资金。

The Chinese team enjoyed the height advantage.

中国队占有身高优势。

I mean to take advantage of it.我想好好利用它。

完成句子

众所周知，每一样东西既有优点又有缺点。我们应该充分利用它的优点来尽量避免它的不利方面。

As we all know，everything has ______and ________.We should ________________its ________to try our best to avoid its________.

【答案】advantages；disadvantages；take advantage of；advantages；disadvantages

3．ever since从......以后

Ever since middle school，my sister Wang Wei and I have dreamed about taking a great bike trip.(P18)

从中学起，我姐姐王薇和我就一直梦想着进行一次伟大的自行车之旅。

此处since为介词。

Ever since then，he comes out only at night.

从那以后，他只在夜间出来。

He has been working away without a rest ever since breakfast.

他从吃早饭之后，就一直在不停地干。

ever since常见用法：

①作介词，后接表示时间的名词，常与现在完成时或现在完成进行时连用。