`-` Thì HTĐ :

`+` KĐ : S + Vs / es

`+` PĐ : S + don't / doesn't + V

`+` NV : Do / Does + S + V ?

`=>` `DHNB` : always , often , usually , ...

`-` Thì HTTD :

`+` KĐ : S + is / am / are + V-ing

`+` PĐ : S + isn't / 'm not / aren't + V-ing

`+` NV : Is / Am / Are + S + V-ing ?

`=>` `DHNB` : now , at the moment , at present , ...

`1`.leaves

`2`.often goes

`3`.do

`4`.is eating

`5`.Does ... come ?

`6`.are going

`7`.Is ... meeting ?

`8`.aren't dancing

`9`.Is ... baking ?

`\text{# TF}`

`1`, leaves

`-` DHNB : every -> chia THTĐ

`2`, often goes

`-` DHNB:  often -> chia THTĐ

`3`, do

`-` DHNB :   often -> chia THTĐ

`4`, is eating

`-` DHNB : now -> chia THTTD

`5`, Does - come

`-` DHNB : usually -> chia THTĐ

`6`, are going

`-` DHNB :at present -> chia THTTD

`7`, Is - meeting

`-` DHNB : at the moment -> chia THTTD

`8`, aren't dancing

`-` DHNB : . now -> chia THTTD

`9`, Is - baking

`-`now -> chia THTTD

`---------------`

`-` Cấu trúc :

`+` THTTD :

`+)` S + am/is/are + V-ing

`-)` S + am/is/are +not + V-ing

`?)` Am/Is/Are + S+ V-ing ?

`-` I + am

`-` He/She/It/số ít + is

`-` You/we/they/số nhiều + are

`+` THTĐ :

`+)` S + V/Vs,es

`-)` S +don't/doesn't +V 

`?)` Do/Does +S +V ?

`-` I /You/we/they/số nhiều + V inf/trợ động từ do

`-` He/She/It/số ít + Vs,es/trợ động từ does