規(guī)則動(dòng)詞詞尾加-ed有三種發(fā)音規(guī)律：1、在清輔音后讀作[t]。如：asked,helped,watched,stopped；2、在濁輔音和元音后讀作[d]。如：enjoyed,studied,moved,called；3、在t/d后讀作[id]。如：wanted,needed。

由“動(dòng)詞原形+-ed”構(gòu)成,具體變化有：

1.直接在詞尾加-ed.如:want—wanted,work—worked,need—needed,clean—cleaned

2.以不發(fā)音的e結(jié)尾的在詞尾加-d.如：like—liked,live—lived,use—used,move—moved

3.以一個(gè)元音字母加一個(gè)輔音字母結(jié)尾的重讀閉音節(jié)動(dòng)詞,先雙寫結(jié)尾的輔音字母,再加-ed.如：stop—stopped,trip—tripped

4.以輔音字母加y結(jié)尾的動(dòng)詞,先把y變成i,再加-ed.如：study—studied,carry—carried,hurry—hurried,marry—married