The -ed ending has three sounds — which one is mine?

Not by guessing or by memorizing each word individually — the sound is fully predictable from the single consonant sound right before the -ed, and once you know the rule you can apply it to any regular verb on sight.

30-second version: -ed is pronounced /t/ after a voiceless consonant sound (walked → /wɔːkt/), /d/ after a voiced consonant or vowel sound (played → /pleɪd/), and a full extra syllable /ɪd/ only after the sounds /t/ or /d/ themselves (wanted → /ˈwɒntɪd/, needed → /ˈniːdɪd/). The rule looks at the sound the base word ends on, not the letter — which is why this needs actual phonetic awareness, not a spelling trick.

Why this rule exists and why it trips learners up

English doesn't like putting two sounds with mismatched voicing next to each other at a word boundary if it can help it easily — a voiceless /t/ or /d/ glued directly onto a voiced sound (or vice versa) is awkward to produce quickly, so the language settled on rules that keep voicing consistent. After a voiceless consonant like /k/, /p/, /s/, /f/, /tʃ/, the -ed devoices to match: /t/. After a voiced consonant or a vowel — /b/, /g/, /v/, /n/, /l/, /r/, or any vowel sound — it stays voiced: /d/. And when the base word already ends on /t/ or /d/, jamming another /t/ or /d/ directly onto it would be nearly impossible to hear as a separate sound, so English inserts a full extra syllable, /ɪd/, to keep the ending audible.

Most learners either apply the spelling literally (pronouncing a /d/ or a full extra syllable for every -ed, regardless of what precedes it) or guess inconsistently, because nobody explicitly taught the rule — it's rarely spelled out in textbooks the way it's spelled out here, even though it's completely regular.

How sayit checks which ending you produced

Because the target IPA for a word like "walked" is fixed — /wɔːkt/, ending in /t/ — the alignment compares your recording's final consonant directly against that target. If you instead added a full syllable ("walk-id") or used /d/ instead of /t/, that shows up as a specific mismatch at the ending, distinct from every other sound in the word, and distinct from the kind of error at play: an added syllable where none belongs is a different fix than a voicing mismatch on a single consonant.

The rule, applied

Drill it

Record: "She walked, played, and wanted to leave." All three endings in one sentence — /t/, /d/, and the extra /ɪd/ syllable — so you can check all three rules in a single take rather than three separate drills.

If the extra syllable in "wanted" or "needed" is the one that's not landing, that's a common, specific gap — say the base word, then say just the added syllable "-id" on its own, then attach them, the same way you'd build up a consonant cluster.

How do I know it's improving?

Test on unfamiliar regular verbs, not just the drill sentence — the real skill is applying the rule on sight to a new word, since a memorized sentence doesn't prove the rule has generalized. Pick five regular verbs you haven't specifically practiced, predict which ending each one takes before you say it, then check the result.

Try it

Open sayit free — no install, no card — and record the drill sentence above. Then try it with three regular verbs of your own choosing, predicting the ending in advance, and see how many you got right before the app told you.