副词的构成
形容词变副词，通常加ly, 其变化有规律可循，口诀;
一般直接加，“元e”去e 加，”辅y”改i加，“le”结尾e 改y。

例如：quick ----- quickly true---- truly happy ---- happily possible ---- possibly 具体规则如下：
1.一般情况下，直接加ly.
careful ---- carefully polite---- politely wide--- widely
2.少数以元音+e 结尾的形容词，去掉e, 再加ly. 如：true--- truly
绝大多数以辅音字母+e 结尾的形容词，直接加ly.
Wise--- wisely nice --- nicely
3.以“y”结尾的形容词，且读音为【i】, 先将y改成i，再加ly.
Happy--- happily heavy --- heavily angry ---- angrily busy---busily
但如果y 的读音为【ai】, 则直接加ly. 如：dry--- dryly shy---- shyly
4.以辅音字母加le 结尾时，去e 加y.
Simple ----simply considerable ----- considerably terrible ---- terribly
5.有些形容词与副词同形。

better last early more else much
far next fast only hard well
straight high deep wide firm colse
注意：有些以ly 结尾的词并非副词，而是形容词。

如：friendly, lively, likely, lovely, brotherly,。