ad为adv的简写，所以为副词，全称adverb，常用于修饰动词、形容词、副词等。adv.在英语中用来修饰动词，形容词，副词或全句,说明时间，地点，程度，方式等概念.副词在句中可作状语,表语,短语。

1)时间和频度副词:now,then,often,always,usually,early,today,lately,next,last,already,generally,frequently,seldom,ever,never,yet,soon,too,immediately,hardly,finally,shortly,before,ago,sometimes,yesterday.

2)地点副词:here,there,everywhere,anywhere,in,out,inside,outside,above,below,down,back,forward,home,upstairs,downstairs,across,along,round,around,near,off,past,up,away,on.

3)方式副词:

carefully,properly,anxiously,suddenly,normally,fast,well,calmly,politely,proudly,softly,warmly

4)程度副词:

much,little,very,rather,so,too,still,quite,perfectly,enough,extremely,entirely,almost,slightly,not.

5)疑问副词:

how,when,where,why.

6)关系副词:

when,where,why.

7)连接副词:

how,when,where,why,whether.