Mas te vale!

[Jane]

How can one say these words in English without sounding rude or stern.
Mas te vale!
Qué te consta!

[Iris]

I'd say "You'd better...".
The second one is "Que te conste".

[Tomisimo]

Que te conste... can often be translated mark my words... or listen carefully...

[Iris]

Wow! You are always spot on.:)

[Tomisimo]

Why, thank you Miss María. :)

[Jane]

Thanks a mil, guys!:thumbsup:

[Tomisimo]

No prob Jane :)