Yes/no

Is this a good restaurant?
No, it is not a good restaurant.

Is she working today?
Yes, she's working today.

Is Mona planting a trees? -> When there is more than one you do not need an 'a'.
No, she is not planting a trees.

Are Did you played yesterday? -> Although it is past tense, you ask with the present tense. i.e. Did she run / jump / fly - instead of ran/ jumped /flew.
Yes, l played yesterday. -> You're talking about what you did rather than yourself.