另外：
一、在形容詞詞尾直接加-ly。如:real-really; helpful-helpfully; careful-carefully; hopeful-hopefully; slow-slowly; quick-quickly; quiet-quietly
二、以輔音字母加y結尾的形容詞要變y為i,然后再加-ly。如:busy-busily; angry-angrily; easy-easily
三、某些以輔音字母加不發音的字母e結尾和以-ue結尾的形容詞要先去掉e,然后再加-y或-ly。