3. worth, worthy, worthwhile

　 这三个形容词在使用时，容易混淆，worth只能作表

　 语，后面常跟名词、代词或动名词的主动形式，

　 worthy的意思是“值得的”“配得上的”“可敬的”，作

　 表语或定语，作表语时，构成以下词组：be worthy of

　 being done / be worthy to be done。worthwhile作“值

　 得的，合算的”讲，只能作表语。

　 这个问题值得讨论。

　 The problem is worth discusaing / discussion.

　 The problem is worthy of being discussed / to be

　 discussed.

　 The problem is worthy of discussion.

　 It is worthwhile to discuss / discussing the problem.

[短语归类]

2. continue, go on

　 两者都有“继续”的意思。

　 (1) continue to do / doing sth. 表示“不停地做某事”，

　 go on to do sth. 则表示“接着做另一件事情”，go on

　 doing sth. 表示“继续做同一件事情”，它可指中断后

　 的继续，也可指不中断的继续。

　 (2) continue后可直接跟名词，而go on后须加介词，

　 才能接名词。

　 (3) continue可用作系动词，go on不可。

　 (4) continue后可接介词短语，表示仍在某地或某个

　 职位，而go on不可。

　 The baby continued to cry / crying all night.

　 这个婴儿哭了一夜。

　 It's time for class. Let's go on learning Lesson 5.

　 上课了，我们继续上第五课。

　 He continues a good friend of mine.

　 他仍是我的一个好朋友。

　 [拓展] to be mntinued 待续 (用于报刊上连载的文章等)

1. because, since, as, for, now that

　 它们都可以被用来引导原因状语从句，其中

　 (1) because 语气最强，一般指事情发生的直接原因，

　 回答提问，一般放在主句之后。

　 Because he was ill, he was late for school.

　 他生病了，所以迟到了。

　 We must stay at home because it rained.

　 (2) since 较弱，指双方都明确的原因或众所周知的原

　 因，泽为“既然”，侧重主句，从句表示显然的或已知

　 的理由。

　 Since you don't like it, I'll put it away.

　 既然你不喜欢，我就把它放在一边。

　 (3) as “由于，鉴于”，指客观事实，常与since互换使

　 用。

　 As there was no answer, I wrote again.

　 鉴于没回复，我又写了一封信。

　 (4) for 是并列连词，不说明直接原因而是对某种情

　 况加以推断，其引导的分句前常有逗号。

　 He must be ill, for he is absent today.

　 他…定是生病了，因为他今天没来。

　 (5) now that 用来说明一种新情况，然后加以推论。

　 Now that you are ready, we'll start at once.

　 既然你已经准备好了，我们马上开始。

8. We two left but the meeting still

☆词语比较☆

7. Nobody knows how much the portrait is

6. I will ask Mr. Brown to ____ our company in-

　 stead of my uncle.

5. The plane out of ___, crashed in the valley at

　 last.

4. They are too weak. I ____ whether they can bear

　 the bad climate.

3. ____ by the beauty of nature, they stayed in

　 Hangzhou for another three days.

2. You have cut your hair so short that I can hardly

　 ____ you.