To be
They doesn't know the answer.
They don't know the answer.
I come from Germany, I'm Germanese
WRONG I come from Germany, I'm German
Jane and Suzie likes pop music.
Jane and Suzie like pop music.
Hans and Sara is from Germany.
Hans and Sara are from Germany.
We live from Spain.
WRONG We are from Spain / We live in Spain.
Is Ron, Hermione and I in this group?
Are Ron, Hermione and I in this group?
You, me and she speaks French.
You, me and she speak French.
People from China are called Chiny.
WRONG People from China are called Chinese.