J'ai vous aidé quand vous etiez tristes ?
Yeah, I tried that too and Duo says it's wrong.
quand t'etais triste. I don't undertand why is not correct.
The contraction of tu into t' is very colloquial and is used only in oral speech.
THANK YOU
The answer "Je vous ai aidé quand vous étiez tristes" should be accepted.
tristes ot triste, which one is correct