`1.` is writing

`-` She isn't writing the lesson now.

`?` Is she writing the lesson now?

`2.` plays

`-` He doesn't play football every day.

`?` Does he play football every day?

`3.` washes

`-` She doesn't wash her clothes every day.

`?` Does she wash her clothes every day?

`4.` will visit

`-` Nam won't visit his friend tomorrow.

`?` Will Nam visit his friend tomorrow?

`5.` sings 

`-` Nam doesn't sing very well.

`?` Does Nam sing very well?

`@` 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 ? 

`-` Dhnb : every morning, every afternoon,every day , often , always , usually

`@` Kiến thức thì hiện tại tiếp diễn : 

`-` Khẳng định : S + am/is/are + V-ing + .....      

`-` Phủ định : S + am/is/are not + V-ing + .....

`-` Nghi vấn : Am/is/are + S + V-ing ?

`-` Dấu hiệu : now , look! , at the present ,........

`@` Kiến thức thì tương lai đơn :

`-` Khẳng định : S + will + V-inf .......

`-` Phủ định : S + will not + V-inf.......

`-` Nghi vấn : Will + S + V-inf ?

`-` Dấu hiệu : next , tomorrow , soon ,.....

1. Thì hiện tại tiếp diễn

+ She is writing the lesson now.

-  She isn't writing the lesson now.

?  Is she writing the lesson now ?

2. Thì hiện tại đơn

+ She plays football everyday.

-  She doesn't play football everyday.

?  Does she play football everyday?

3. Thì hiện tại đơn

+ She washes her clothes everyday

-  She doesn't wash her clothes everyday

?  Does she wash her clothes everyday ?

4. Thì tương lai đơn

+ Nam will visit his friend tomorrow.

-  Nam won't visit his friends tomorrow.

?  Will Nam visit his friends tomorrow?

5. Thì hiện tại đơn 

+ Nam sings very well.

-  Nam doesn't sing very well.

?  Does Nam sing very well?