I could brattle you could brattle he could brattle we could brattle you could brattle they could brattle
V-ing form
I could be brattling you could be brattling he could be brattling we could be brattling you could be brattling they could be brattling
Perfect
I could have brattled you could have brattled he could have brattled we could have brattled you could have brattled they could have brattled
V-ing perfect
I could have been brattling you could have been brattling he could have been brattling we could have been brattling you could have been brattling they could have been brattling
Negation
Simple form
I could not brattle you could not brattle he could not brattle we could not brattle you could not brattle they could not brattle
V-ing form
I could not be brattling you could not be brattling he could not be brattling we could not be brattling you could not be brattling they could not be brattling
Perfect
I could not have brattled you could not have brattled he could not have brattled we could not have brattled you could not have brattled they could not have brattled
V-ing perfect
I could not have been brattling you could not have been brattling he could not have been brattling we could not have been brattling you could not have been brattling they could not have been brattling
Interrogative form
Simple form
could I brattle? could you brattle? could he brattle? could we brattle? could you brattle? could they brattle?
V-ing form
could I be brattling? could you be brattling? could he be brattling? could we be brattling? could you be brattling? could they be brattling?
Perfect
could I have brattled? could you have brattled? could he have brattled? could we have brattled? could you have brattled? could they have brattled?
V-ing perfect
could I have been brattling? could you have been brattling? could he have been brattling? could we have been brattling? could you have been brattling? could they have been brattling?
Interro-negative form
Simple form
could I not brattle? could you not brattle? could he not brattle? could we not brattle? could you not brattle? could they not brattle?
V-ing form
could I not be brattling? could you not be brattling? could he not be brattling? could we not be brattling? could you not be brattling? could they not be brattling?
Perfect
could I not have brattled? could you not have brattled? could he not have brattled? could we not have brattled? could you not have brattled? could they not have brattled?
V-ing perfect
could I not have been brattling? could you not have been brattling? could he not have been brattling? could we not have been brattling? could you not have been brattling? could they not have been brattling?