`1` are going
DH : now
`2` are having
DH : at the moment
`3` is reading
DH : now
`4` are doing
DH : at present
`5` are brushing
DH : at the moment
`6` are traveling
DH : at present
`7` isn't doing / is sleeping
DH : now
`8` aren't working / are doing
`9` isn't doing / is watching
DH : now
`10` Is / reading
DH : now
`11` Are / playing
DH : in the yard
`12` Are / washing
`13` Is / traveling
DH : now
`14` is / reading
DH : now
`15` is listening
`16` is traveling
Công thức :
(+) S + am/is/are + Ving .
(-) S + am/is/are + not + Ving .
(?) Am/is/are + S + Ving ?