-ed

It is common to have trouble, especially when reading, with the English past tense marker -ed, because it is pronounced in three different ways: /d/, /t/, and /ɪd/

After an unvoiced consonant (see Sounds of English#Consonants), -ed is pronounced /t/:

• popped out for some tea = pa:pt aʊt fər səm ti:
• looked like rain = lʊkt laɪk reɪn
• She had searched the train stations. = ʃi: hæd sɜː(r)tʃt ðə 'tren 'steɪʃənz

After a voiced consonant, -ed is is pronounced /d/

• They pulled him up to safety = 'ðeɪ pʌld ɪm ʌp tə 'seɪfti
• radioed air traffic control = 'reɪdioʊd 'eər 'træfɪk kən'troʊl

After the sounds /t/ or /d/, -ed is pronounced /ɪd/.