一、在形容词词尾直接加-ly。如:real-really;
helpful-helpfully;
careful-carefully;
hopeful-hopefully;
slow-slowly;
quick-quickly;
quiet-quietly
二、以辅音字母加y结尾的形容词要变y为i,然后再加-ly。如:busy-busily;
angry-angrily;
easy-easily
三、某些以辅音字母加不发音的字母e结尾和以-ue结尾的形容词要先去掉e,然后再加-y或-ly。如:
terrible-terribly;
true-truly;
gentle-gently
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