`Answer:`

`1,` isn't reading

`2,` are you doing

`3,` are working

`4,` isn't listening

`5,` is sitting

`6,` are you studying

`7,` is always making

`8,` is

`9,` is wearing 

`10,` is getting

`11,` are `-` are playing

`12,` is coming

`13,` are practising

`14,` is knocking

`15,` is rising 

`16,` aren't cooking

`17,` is watering

`18,` are you looking

`19,` isn't sleeping

`20,` are giving

____________________________________

$\text{*Present continuous:}$

`+)` $\text{S + am/is/are + V_ing}$

`-)` $\text{S + am/is/are + not + V_ing}$

`?)` $\text{Am/Is/Are + (not) + S + V_ing}$

`@` DHNB: now, at the moment, at present, .......

`@` Note:

`-` $\text{I + am}$

`-` $\text{You/We/They/DT số nhiều + are}$

`-` $\text{He/She/It/DT số ít + is}$

`#TD`