might witness
Regular verb: witness - witnessed- witnessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I might witness
you might witness
she might witness
we might witness
you might witness
they might witness 	I might be witnessing
you might be witnessing
she might be witnessing
we might be witnessing
you might be witnessing
they might be witnessing	I might have witnessed
you might have witnessed
she might have witnessed
we might have witnessed
you might have witnessed
they might have witnessed	I might have been witnessing
you might have been witnessing
she might have been witnessing
we might have been witnessing
you might have been witnessing
they might have been witnessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mightn't witness
you mightn't witness
she mightn't witness
we mightn't witness
you mightn't witness
they mightn't witness 	I mightn't be witnessing
you mightn't be witnessing
she mightn't be witnessing
we mightn't be witnessing
you mightn't be witnessing
they mightn't be witnessing	I mightn't have witnessed
you mightn't have witnessed
she mightn't have witnessed
we mightn't have witnessed
you mightn't have witnessed
they mightn't have witnessed	I mightn't have been witnessing
you mightn't have been witnessing
she mightn't have been witnessing
we mightn't have been witnessing
you mightn't have been witnessing
they mightn't have been witnessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
might I witness?
might you witness?
might she witness?
might we witness?
might you witness?
might they witness? 	might I be witnessing?
might you be witnessing?
might she be witnessing?
might we be witnessing?
might you be witnessing?
might they be witnessing? 	might I have witnessed?
might you have witnessed?
might she have witnessed?
might we have witnessed?
might you have witnessed?
might they have witnessed? 	might I have been witnessing?
might you have been witnessing?
might she have been witnessing?
might we have been witnessing?
might you have been witnessing?
might they have been witnessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mightn't I witness?
mightn't you witness?
mightn't she witness?
mightn't we witness?
mightn't you witness?
mightn't they witness? 	mightn't I be witnessing?
mightn't you be witnessing?
mightn't she be witnessing?
mightn't we be witnessing?
mightn't you be witnessing?
mightn't they be witnessing? 	mightn't I have witnessed?
mightn't you have witnessed?
mightn't she have witnessed?
mightn't we have witnessed?
mightn't you have witnessed?
mightn't they have witnessed? 	mightn't I have been witnessing?
mightn't you have been witnessing?
mightn't she have been witnessing?
mightn't we have been witnessing?
mightn't you have been witnessing?
mightn't they have been witnessing?