1、形容词变副词通常是加 ly,其变化有一定规律可循：1) .一般情况下直接加ly，如：quick-quickly; polite-politely; sad-sadly; immediate-immediately; recent-recently2). 少数以 e 结尾（ue）的形容词，要去掉 e 再加 -ly。如：true-truly; due-duly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-nicely3). 以辅音字母加 y 结尾的（读音为 / i /）， 先将 y 改成i ，
2、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-shyly4).以 ic 结尾的词，加 ally，如：economic-economically; basic-basically; scientific-scientifically; automatic-automatically; energetic-energetically5).以辅音字母加 le 结尾时,去 e 加 y，如：simple-simply; c
3、onsiderable-considerably; terrible-terribly; gentle-gently; possible-possibly; probable-probably; incredible-incredibly元音字母加 le 时加 ly，如：sole-solely 。但是 whole-wholly 例外。6). 以 -ll 结尾时，只须加 y，如：dull-dully; shrill-shrilly需注意: 有些以 ly 结尾的词是形容词而非副词。如：friendly people; motherly care; lovely dog; monthly exam; heavenly peace; a manly sport
