`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

`@` Kiến thức thì hiện tại đơn : 

`-` Khẳng định : S + V(s/es) + .....      

`-` Phủ định : S + don't/doesn't + V .......

`-` Nghi vấn : Do/does + S + V ? 

`1.` Trung brush his teeth every morning.

`⇒` brush `→` brushes

`@` Dấu hiệu nhận biết: every morning `→` Hiện tại đơn

`(+)` `S` `+` `V`(s/es) `+` ...

`2.` She don't want to miss her school bus.

`⇒` don't `→` doesn't

`@` Hiện tại đơn:

`(-)` S `+` do/does `+` not `+` V(Inf)

`-` She `+` does

`3.` Does the student play chess at break time `?`

`⇒` Does the student `→` Do students

`4.` They go always shopping in the evening.

`⇒` go always `→` always go

`@` Các động từ chỉ tần suất đứng trước chủ ngữ, sau động từ chính của câu  

`5.` Jame often play hide and seek in the park.

`⇒` play `→` plays

`@` Dấu hiệu nhận biết: often `→` Hiện tại đơn

`-` Jame (Chủ ngữ số ít) `+` `V`(s/es)

`6.` He sometimes does homework at the school library.

`⇒` at `→` in

7. Ann gets up at 6 o'clock and is having breakfast every day.

`⇒` is having `→` has

`@` Dấu hiệu nhận biết: every day `→` Hiện tại đơn

`8.` I am often playing football on Saturday.

`⇒` am often playing `→` often play

9. The children don't listen to English songs very often.

`⇒` don't listen ... very often `→` don't often listen

`10.` Do your brother help you with your homework`?`

`⇒` Do `→` Does

`-` Does `+` your brother

`\text{#Rain}`