worthy of 作表语时，后面可接名词或-ing形式（常用其被动式）。如

The place is worthy of a visit.

The place is worthy of being visited.

4) worthy后面也可接动词不定式，被动含义时也须用不定式的被动式。如：

The boy is worthy to be praised.

= The boy is worth praising.

5. 有些副词与形容词形式相同，表示同一含义，常见的有：

early , late , fast , high , straight

6. 副词的位置

1) 修饰形容词和其它副词时，通常放在被修饰词之前，但enough一词例外。如

This is a very useful tool.

She plays the piano fairly well.

He doesn't work hard enough.

The child is old enough to go to school.

2) 频度副词 (often , usually , seldom , hardly , never, sometimes, always等)要放在实义动词的前面，be 动词、助动词、情态动词的后面。如

We often go to the park.

He is always ready to help others.

3) 地点副词、时间副词、方式副词常位于句末。如

I remember that I met him somewhere.

Everything went smoothly.

4) 同时出现几种副词时的排列顺序：方式副词→地点副词→时间副词。如

He made his model plane perfectly there yesterday.

5) 作定语的副词放在被修饰词之后。

People here are very friendly to me.

7. 某些以-ly结尾的词是形容词而不是副词。如friendly , comradely , lively , lovely, lonely, likely, deadly , silly , orderly.

8. 有些副词有两种形式（加-ly后变为另一副词），但意义不同，使用时应予注意。常见的有：

late 迟， 晚 lately 近来

high 高 highly 高度地

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