过去式加 -ed 的读音

1、在清辅音后,读清辅音 / t / .

worked / kt / helped / pt / passed / st /

washed / t / watched / t /

2、在浊辅音和元音后,读浊辅音 / d / .

played / d / carried / id / answered / d /

lived / vd / used / zd / called / ld /

3、在 / t,d / 音后面,读 / id / .

wanted / tid / needed / did /