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