1、一般情况下直接加“ly”。
如：quick-quickly; polite-politely; sad-sadly;imediate-immediately; recent-recently.
2、 少数以e结尾的形容词，要去掉e再加-ly.
如：true-truly; due-duly.
扩展资料
3、绝大多数辅音字母加e结尾的形容词直接加-ly。如：
polite-politely; wide-widely; wise-wisely;nice-nicely.
4、以“y”结尾的'，且读音为 / i /， 先将“y”改成“i”，再加“ly”
如：happy-happily; heavy-heavily; angry-angrily;busy-busily.
但是如果读音为 / ai /， 直接加ly，如：dry-dryly; sly-slyly; shy---shyly.
5、以ic 结尾的词，加ally.
如：economic-economically; basic-basically;scientific-scientifically; automatic-automatically; energetic-energetically;
6、以辅音字母加le结尾时,去e加y——高考最喜欢考这一点规则。
如：simple-simply; considerable-considerably;terrible-terribly.
元音字母加le结尾时，直接加 ly，如：sole-solely。但是whole-wholly例外。
7、以-ll结尾时，只须加 –y.
如：dull-dully;shrill-shrilly.
