一般地說，可以互換的這類詞，形容詞詞形的副詞表示比較具體的概念， 經常用語口語中，不太正式；后綴-ly形式的副詞，表示比較抽象的概念，有引申義，并有一定感情色彩，變副詞比較級時，用此類副詞，如修飾動詞和分詞，放在它們前面。

1) cheap: often used instead of cheaply, esp. in casual conversation and with verbs like buy and sell

Do you like this shirt? I bought it really cheaply.

cheaply I can't sell you more cheaply.

2) clean: completely, used with (1) verb forget (2) the proposition over, through (3) adv away out

I ~ forget. The ball sailed ~ over the roof.

The prisoner got ~ away. I am afraid I am clean out of food.

cleanly: precisely in a clean manner, often used with v cut.

He caught the ball ~ . The doctor cut ~ through the abdominal wall.

3) clear: not touching

Please stand clear of the gate.

clearly: distinctly, obviously, similar to the meaning of clear

I can't see ~ without my glasses.

We ~need to think again.

4) close: near

Come close, I want to tell you something.

closely: carefully, with great attention

Study this ~ it's very important.

5) dead: exactly completely, used in certain expressions

~ right, ~ sure, ` tired, ~ slow, ~ ahead, ~ drunk, ~ straight

deadly: fatally

He was ~ injured in the crash.

6) direct: used instead of directly in talking about journeys and timetables

The plane goes ~ from London to Houston.

7) easy: used in certain expressions

Take it easy. easy come, easy go.

 

本文來自：逍遙右腦記憶 http://www.yy-art.cn/waiyu/yingyujiyi/7989.html

相關閱讀：應試法寶：20條絕招助你拿下GRE單詞
胡敏讀故事記單詞第4篇
有關英語記憶單詞的方法
單詞聯(lián)想記憶法
英語單詞記憶綴合法