​A voiceless consonant is one which does not have a vibration of the vocal cords. If you put your hand on your throat as you pronounce a voiceless phoneme, you will push out air to make the sound , but not while using your voice.



/t/
passed
walked
pushed
crouched

​The final 'ed" is pronounced /d/ after voiced consonants like /z/ or /v/. The "ed" in sneezed is pronounced /d./

sneezed
squeezed
waved
primed
mentioned
encircled
obliged
gazed

​ An voiced consonant makes a vibrating sound when you pronounce it. Touch your throat when you say /z/. Your vocal cords vibrate with fricative sounds.

buzzed
cruised
blazed

​Words that end in a t or d generally require an extra syllable to pronounce the " ed" as /id./


dated
posted
waded
graded