Interactive pronunciation book
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These are the symbols you will see in a dictionary. Click any one to hear it. You do not need to memorize them.
English lets a word stop dead on a consonant, and it lets consonants stack up at the end: texts, asked, world, twelfth. Most languages do not allow this, so your mouth quietly repairs it, and the repair lands on hundreds of your most common words.
The cost is bigger than it looks. When you add a vowel to dog, you have turned a one-beat word into a two-beat word. English rhythm is built on counting beats, so this does not just mark your accent. It scrambles the timing your listener is using to follow you.
And when you drop a consonant instead, you can lose a whole grammatical ending: the plural, the past tense.
Your language has rules about how a syllable may end, and English breaks them. Your mouth fixes the illegal ending, and there are exactly two ways to do it.
You open it up by adding a vowel. Club becomes clubi, dog becomes doguh, laptop becomes laptopi.
Or you simplify it by dropping a consonant. Texts becomes tex, asked loses something, twelfth collapses.
These look like opposite errors. They are the same error. Once you see that, one instruction fixes both. Many people do both, in different words, so do not assume you only do one.
Adding a vowel and dropping a consonant look like opposite errors. They are the same error, and once you see that, one instruction fixes both.
For a single final consonant, use the silent lock. Your mouth reaches the position and freezes there. The consonant stops. Nothing comes after it. The picture: a door clicking shut, not clicking shut and then squeaking.
Test it physically. Hold a flat hand in front of your mouth and say dog. You should feel no extra breath and hear no vowel after the g. Whispering the ending also works, because a whisper strips the vowel away and leaves the consonant.
For a group of consonants, slow down and say all of them. Do not add anything between them and do not drop any. Build it up: tex, text, texts.
Hold a flat hand in front of your mouth and say dog. You should feel no extra breath and hear no vowel after the g.

Pick anything above, then record yourself saying it. Your recording appears in red over the model in gray. You are comparing shapes, not chasing a score.
You say tex for texts but doguh for dog. One drops a sound and one adds a sound. Is that two problems?