Ex3:
$\text{1.}$ don't visit
$\text{2.}$ Does Mai go - goes
$\text{3.}$ give
$\text{4.}$ plays - doesn't like
$\text{5.}$ do they go
$\text{6.}$ don't study - is
$\text{7.}$ Do your parents watch
$\text{8.}$ does
$\text{9.}$ use
$\text{10.}$ doesn't usually play
$\text{* HTD: Với V}$
$\text{(+)}$ S + V<s,es>
$\text{(-)}$ S + don't/ doesn't + V<infi>
$\text{(?)}$ Do/ Does + S + V<infi>?
$\text{Với be}$
$\text{(+)}$ S + is/ are/ am + O.
$\text{(-)}$ S + isn't/ aren't/ am not + O.
$\text{(?)}$ Is/ Are/ Am + S + O?
