一般地说，可以互换的这类词，形容词词形的副词表示比较具体的概念， 经常用语口语中，不太正式；后缀-ly形式的副词，表示比较抽象的概念，有引申义，并有一定感情色彩，变副词比较级时，用此类副词，如修饰动词和分词，放在它们前面。

　　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.

　　Easier said than done.

　　easily  I can do very easily.

　　8) fair: used in the expression play ~, fight ~

　　fairly: justly, honestly

　　You must do it ~.

　　9) fine: well, used in some expressions

　　That suits me fine. You are doing ~.

　　finely: elaborately (细微地） (not commonly used

　　He studied it very finely.

　　10) free: without payment

　　You can't eat ~ in my restaurant.

　　freely: without limit or restriction(限制）

　　You can't speak ~ in front of my father.

　　11) hard: to show degree

　　He hit hard.

　　hardly: almost not

　　12) high it refers to high position.

　　Don't go higher. It is dangerous.

　　highly: it refers to an extreme degree "very much".

　　She is ~ paid. It is ~ amusing.

　　13) just: a moment ago  I have just come here.

　　justly: in accordance with justice or the law.

　　You must do it justly.

　　14) late: not on time   He hates arriving late.

　　lately: recently  I haven't heard from you lately.

　　15) loud: used instead of loudly in informal conversation with the verbs talk, speak, shout, laugh

　　loudly: in a big voice  They quarreled ~.

　　16) low: in a small voice

　　Can you speak low?

　　lowly: in a humble way

　　Don't speak to him lowly.

　　17) most: very    Which do you like most?

　　mostly: mainly, most often, in most cases

　　18) pretty: rather   ~ well, ~ soon

　　prettily: pleasing to people (悦人地）

　　He danced ~.

　　19) quick: in informal English used instead of quickly

　　quickly  He acted ~.

　　20) real in informal English used instead of really

　　really   Are you ~ tell me the truth.

　　21) right: just, exactly, all the way

　　The ball hit me ~ in the nose.

　　He arrived ~ after breakfast.

　　Turn right at the traffic lights.

　　rightly: correctly  right can be used informally instead of rightly

　　You guessed right(ly)

　　22) sharp: punctually  准时地

　　He arrived at six o'clock ~.

　　sharply: 锐利地，急剧地

　　look ~ speak ~

　　23) short: suddenly

　　The car stopped suddenly.

　　shortly: soon   He will come shortly.

　　24) slow used in informal conversation instead of slowly

　　go ~, drive ~

　　25) sound: 彻底地 used in the expression  sound asleep

　　soundly: 非常好地  He is sleeping soundly.

　　26) straight and straightly used in the same way.

　　27) sure: used in American English meaning certainly

　　surely:  He speaks very surely.

　　28) tight: used instead of tightly in informal conversation.

　　hold ~, pack ~.  The door was shut ~.

　　tightly: We'd better sit tightly.

　　29)wide: He opened his eyes wide.

　　widely: in many different places

　　He has traveled widely.

　　30) wrong used instead of wrongly in informal conversation.

　　You guessed wrong(ly)