How to Pronounce -ed verb endings: American English Pronunciation.

PAST SIMPLE – Regular verbs

The ending –ed has three pronunciations: /t/, /d/, and /id/

  

End of the verb	Simple Form	Simple Past	Pronunciation	Explanation
Voiceless	Help	Helped	Help /t/	Final -ed is pronounced /t/ if a verb ends in a voiceless sound.
	Laugh	Laughed	Laugh /t/
	Guess	Guessed	Guess /t/
Voiced	Rub	Rubbed	Rub /d/	Final -ed is pronounced /d/ if the simple form of the verb ends in a voiced sound.
	Live	Lived	Liv /d/
	Seem	Seemed	Seem /d/
-d or –t	Need	Needed	Need / id  /	Final -ed is pronounced /id / if a verb ends in the letter "d" or "t".
	Want	Wanted	Want / id /