1) They studies math .
studies => study
2) Why not she live him ?
not => doesn't
3) Will your father stayed in Ho Chi Minh City ?
stayed => stay
1. They studies math
studies -> study2. Why not she live him?
not -> doesn'tlive -> leave3. Will your father stayed in Ho Chi Minh City?
stayed in -> stay at
1. Studies => study
2. not => doesn't
3. Stayed => Stay
