French language Q&A Forum

For regarde-les I think I hear a liaison which sounds, to an English person something like regar-delay. 

Similarly for verse-les I think I hear a liaison which sounds like ver-selay.

However I don't hear a similar liaison for téléphone-lui or appelle-les.

Is there a rule for when to  liase the final part of a word ending in the letter e?

Je ai: when we have 2 vowels we use ' so it becomes J'ai so why in Tu as the rule does not apply as we don't write t'as