1. If the verb
ends in voiceless (無声音) [ch] [f],[k], [p], [s], or [sh], then –ed is not articulated as a separate syllable, as [t].
botched [ba:cht]
stuffed [stəft]
picked [pIkt]
skipped [skIpt]
confessed [can fEst]
wished [wIsht]
2. If the verb ends in [t] or [d], then –ed is articulated as a separate syllable, as [əd] or [Id].
competed [cəm pi:
tId]
waited [we:
tId]
busted [bəs tId]
The last syllable is usually reduced and difficult to hear.
If the verb ends in any other sound, then –ed is articulated as [d]. It is not pronounced as a separate syllable.
These are voiced.
cleaned [kli:nd]
bobbed [babd]
stormed [stormd]
gagged [gægd]
cleansed [klEnzd]
Please use English well!