$$1. $$ brush $$→$$ brushes
$$2. $$ don't $$→$$ doesn't
$$3. $$ Does $$→$$ Do
$$4. $$ go always $$→$$ always go
$$5. $$ play $$→$$ plays
$$6. $$ at $$→$$ in
$$7. $$ is having $$→$$ has
$$8. $$ am often playing $$→$$ often play
$$9. $$ Không có lỗi sai
$$10. $$ Do $$→$$ Does
$$*$$ Thì HTĐ:
$$(+)$$ S + V(es/s)
$$(-)$$ S + don't/doesn't + V-bare
$$(?)$$ Do/Does + S + V-bare?
$$-$$ I,you,we,they,N(số nhiều) + V-bare/do(not)
$$-$$ He,she,it,N(số ít) + V(es/s)/does(not)
$$→$$ Trạng từ tần suất (often, usually, always,...) đứng sau tobe, sau trợ động từ và trước động từ thường