I don't doubt that ...我肯定......（=I'm sure/certain that...）

I doubt if/whether ...我不确定......（=I'm not sure/certain if/whether...）

[练习] 中译英

1). 不知道那是不是他想要的。

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2). 那件事情没有什么可疑之处。

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Keys: 1). I doubt if that was what he wanted.

2). There's not much doubt about it.

5. worth adj.值得（做某事）; 有（做某事）的价值; n.价值; 用处

[典例]

1). The new car cost a lot of money, but it's certainly worth it. 买这辆新汽车花了很多钱, 但确实物有所值。

2). The thieves stole 1 million worth of jewellery. 窃贼偷走了价值100万英镑的珠宝。

[重点用法]

be worth doing sth值得（做某事）; 有（做某事）的价值

worth of sth用于表示数量﹑ 持续时间等的名词之后，值某金额的量

[练习] 中译英

1). 这本书值得一读。

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2). 他有十英镑的汽油。

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Keys: 1). The book is worth reading/It's worth reading the book.

2). He has ten pounds' worth of petrol.

Ⅳ 重点词组 （旨在提供综合运用所需材料）

1. in return 回报,作为报酬

[典例]

What can we do for them in return for all the help they have given us?

我们将怎样来报答他们所给予我们的种种帮助呢?

[短语归纳]

in turn 轮流地,依次; 反过来 by turns 轮流地,时而...时而...

[练习] 中译英

1). 我请他喝酒以酬谢他的帮助。

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2). 向您献花聊表谢忱。

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Keys: 1). I bought him a drink in return for his help.