Pronunciation: Sorting -ed Sounds by Final Sound
A student is preparing a pronunciation card for an English quiz. The card lists six past-tense verbs: visited, played, wanted, watched, needed, stopped. The class rule is: -ed is /ɪd/ after /t/ or /d/; /t/ after voiceless sounds; /d/ after voiced sounds. The student sorts visited, wanted, and needed into the /ɪd/ group, played into /d/, and watched and stopped into /t/. Then she hesitates over needed because the base verb need ends with the letter e, and she remembers that 'silent e' often means a long vowel. She also has to add two new words, opened and counted, to the card. She has five minutes before the quiz.
1. Is 'needed' in the correct group? Explain using sounds, not letters.
Read the worked answer
Yes. The rule depends on the final sound of the base verb. 'Need' ends in the voiced /d/ sound, so -ed is /ɪd/. The final e in the spelling is silent and does not create a vowel sound at the end. 'Needed' is /ˈniːdɪd/, with two syllables, not /niːd/ + /d/. The student's worry about 'silent e' is a spelling issue, not a sound issue.
2. Place 'opened' and 'counted' in the correct groups and give the reason for each.
Read the worked answer
'Opened' goes in the /d/ group: base 'open' ends in the voiced /n/ sound, so -ed is /d/ - /ˈoʊpənd/. 'Counted' goes in the /ɪd/ group: base 'count' ends in the voiceless /t/ sound, so -ed is /ɪd/ - /ˈkaʊntɪd/. The key is the last sound, not the last letter: 'opened' has no t or d letter at the end, while 'counted' does.
3. What is the most likely spelling trap on this card? Explain with one example.
Read the worked answer
The trap is using the last letter instead of the last sound. For example, 'watched' ends with the letters 'ch,' but the final sound is the voiceless /tʃ/, so -ed is /t/, not /ɪd/. A student who looks for a 't' letter may miss the rule. Similarly, 'needed' ends with a silent e, which looks like a vowel ending but is pronounced with a final /d/ sound, so it takes /ɪd/.