The audio here is generated speech. A recorded human voice for this lesson is on the way.
The two sounds
CH and J are both "stop then slide" sounds. Your tongue presses behind your top teeth, a little further back than for T, then releases into a hissing sound. CH, as in "cheap", is voiceless. J, as in "jeep", is the same movement with your voice on. The letter G often makes the J sound too: "gym", "page", "large".
Learners often swap these for SH and ZH, saying "ship" for "chip". The fix is the stop at the start: CH begins with a short block, like T, before the hiss. Say "t-sh" quickly and you have CH.
Hear the difference
Tap each word. Then test your ear.
"Tch" at the end is CH. "Dge" at the end is J.
Say it out loud
Tap a sentence to hear it. Say it after the voice.
Practice · 3 min
Repeat each sentence. Put a clear stop at the start of every CH and J. Record the first sentence and listen: "just", "choose", "cheapest" and "chair" should all start with a short block before the hiss.
Say it today
Use it once in a real conversation before tomorrow. Out loud counts, even to yourself.