` - ` Ta chia thì HTĐ phủ định :

` ( - ) ` : S + don't / doesn't + V nguyên mẫu

` - ` : I / you / we / they / số nhiều + Don't + V nguyên mẫu

` - ` : He / she / it / số ít / tên riêng + doesn't + V nguyên mẫu

` 11 ` don't watch

` 12 ` : don't like

` 13 ` don't work

` 14 ` : don't litsen

` 15 ` : don't have

` 16 ` : doesn't have

` 17 ` : doesn't do

` 18 ` : doesn't go

` 19 `: doesn't like

` 20 ` : doesn't exercise 

`11.` don't watch

`12.` don't like

`13.` don't work

`14.` don't listen

`15.` don't have 

`16.` doesn't have

`17.` doesn't do 

`18.` doesn't go 

`19.` doesn't like

`20.` doesn't exercise

`=>` Ta có công thức phủ định của Hiện tại đơn như sau: 

I,you,we,they,danh từ số nhiều + don't + V_inf

He,she,it,danh từ số ít + doesn't + V_inf