副詞adverb，縮寫為adv.，用來修飾動詞、形容詞、其他副詞或整個句子，有時也能修飾名詞，表示時間、地點、方式、程度、動作、頻度等，在句中主要用作狀語。
一、副詞的位置：
1） 副詞修飾動詞，一般位于動詞之后。
Make sure to lock the bike carefully by pushing the front wheel into an empty dock.
2） 在be動詞、助動詞之后。
Obesity is significantly correlated with sleep duration.
3）副詞修飾形容詞或副詞，一般位于這些詞前。
Please make sure the terms are exactly the same with stipulations.
當(dāng)副詞是enough時，要放在形容詞的后面，但enough是形容詞時，在名詞前后都可。
I don't know him well enough.
There is enough food for everyone to eat.
There is food enough for everyone to eat.
注意：
a. 大多數(shù)方式副詞位于句尾，但賓語過長，副詞可以提前，以使句子平衡。
Luckily, I had not yet developed what the doctors like to refer to as co-morbidities.
b. 方式副詞well, badly, hard等只放在句尾。
He speaks English well.
二、副詞的排列順序：
1） 時間，地點副詞，小單位的在前，大單位在后。
I have a meeting in Shanghai China at 3 o’clock of Tuesday.
2） 方式副詞，短的在前，長的在后，并用and或but等連詞連接。
Please write slowly and carefully.
3） 多個不同副詞排列：程度+地點+方式+時間副詞。
The children played games quietly in their room yesterday.
注意：副詞very 可以修飾形容詞，但不能修飾動詞。
改錯：(錯) I very like English.
(對) I like English very much.