规则动词的过去式词尾变化有几种：
1．一般情况下加ed,如watched,planted,watered,pulled,climbed,picked.
2．以不发音字母e结尾的加d,如liked,moved,tasted.
3．以辅音字母加y结尾的变y为i再加ed,如study——studied.
4．以1个元音字母加1个辅音字母结尾的重读闭音节,双写最后一个辅音字母再加ed,如stop——stopped.
词尾读音有3种：
a．在浊辅音和元音后读[d],如lived,watered,listened,played.
b．在清辅音后读[t],如liked,helped,watched.
c．在[t],[d]音后读[Id],如planted,wanted,handed(上交).