Currently I'm studying English pronunciation and having a hard time pronouncing the t's sound such as it's and that's. I thought that "t's" sounded the same as the "ch" sound but one of my friend said it doesn't sound the same.
She said that my tongue has to touch the palate to pronounce "t's" and it sounds more like the "z" sound.
But since she is French, I couldn't believe it without asking English native speakers.
Can you guys help me?