1, Jason is doing his homework at the moment.

2, Are you sleeping?

3, My sister is not cooking today.

4, I am vacuuming the carpet right now.

5, Lee and I are painting the fences today.

Cấu trúc của các câu trên : 

1, (Subject + is/are + verb-ing)

2, (Auxiliary verb + subject + verb-ing)

3, (Subject + is/are + not + verb-ing)

4, (Subject + am/is/are + verb-ing)

5, (Subject + are + verb-ing)

`1.` is doing

`-` At the moment `->` HTTD

`2.` Are you sleeping?

`3.` isn't cooking

`-` Today `->` HTTD

`4.` am vacuuming

`-` Right now `->` HTTD

`5.` are painting 

`->` Today `->` HTTD

`@` Hiện tại tiếp diễn:

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

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

`(?)` Is/am/are `+` S `+` V-ing?

`-` DHNB: At the moment`,` at present`,` now, Look!, Keep silent!`,...`

`+` Hành động đang xảy ra