I might birl you might birl he might birl we might birl you might birl they might birl
V-ing form
I might be birling you might be birling he might be birling we might be birling you might be birling they might be birling
Perfect
I might have birled you might have birled he might have birled we might have birled you might have birled they might have birled
V-ing perfect
I might have been birling you might have been birling he might have been birling we might have been birling you might have been birling they might have been birling
Negation
Simple form
I mightn't birl you mightn't birl he mightn't birl we mightn't birl you mightn't birl they mightn't birl
V-ing form
I mightn't be birling you mightn't be birling he mightn't be birling we mightn't be birling you mightn't be birling they mightn't be birling
Perfect
I mightn't have birled you mightn't have birled he mightn't have birled we mightn't have birled you mightn't have birled they mightn't have birled
V-ing perfect
I mightn't have been birling you mightn't have been birling he mightn't have been birling we mightn't have been birling you mightn't have been birling they mightn't have been birling
Interrogative form
Simple form
might I birl? might you birl? might he birl? might we birl? might you birl? might they birl?
V-ing form
might I be birling? might you be birling? might he be birling? might we be birling? might you be birling? might they be birling?
Perfect
might I have birled? might you have birled? might he have birled? might we have birled? might you have birled? might they have birled?
V-ing perfect
might I have been birling? might you have been birling? might he have been birling? might we have been birling? might you have been birling? might they have been birling?
Interro-negative form
Simple form
mightn't I birl? mightn't you birl? mightn't he birl? mightn't we birl? mightn't you birl? mightn't they birl?
V-ing form
mightn't I be birling? mightn't you be birling? mightn't he be birling? mightn't we be birling? mightn't you be birling? mightn't they be birling?
Perfect
mightn't I have birled? mightn't you have birled? mightn't he have birled? mightn't we have birled? mightn't you have birled? mightn't they have birled?
V-ing perfect
mightn't I have been birling? mightn't you have been birling? mightn't he have been birling? mightn't we have been birling? mightn't you have been birling? mightn't they have been birling?