`1`/ I am working now.
`2`/ She is cooking dinner at the moment.
`3`/ He is playing games at the present.
`4`/ They are playing football now.
`5`/ We are having dinner at the moment.
Công thức present continuous ( HTTD )
`(+)` S + to be ( am, is, are ) + v-ing + ....
`(-)`: S + to be ( am, is, are) + not + v-ing + ......
`(?)`: To be + S + v-ing + ...... ?
I + am / am not
He, she, it is / is not ( isn't )
You, we, they + are / are not ( aren't )