To be
Does he lives in this street?
Does he live in this street?
I plays football on Mondays.
WRONG I play football on Mondays.
Does he do aerobics?
Right
She live in Brazil.
WRONG She lives in Brazil.
Am Josh, Lisa and I in this group?
Are Josh, Lisa and I in this group?
You and me speaks Mandarin.
You and me speak Mandarin.
German people speaks German.
WRONG: German people speak German.