would sustain
Regular verb: sustain - sustained- sustained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd sustain
you'd sustain
he'd sustain
we'd sustain
you'd sustain
they'd sustain 	I'd be sustaining
you'd be sustaining
he'd be sustaining
we'd be sustaining
you'd be sustaining
they'd be sustaining	I would've sustained
you would've sustained
he would've sustained
we would've sustained
you would've sustained
they would've sustained	I would've been sustaining
you would've been sustaining
he would've been sustaining
we would've been sustaining
you would've been sustaining
they would've been sustaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I wouldn't sustain
you wouldn't sustain
he wouldn't sustain
we wouldn't sustain
you wouldn't sustain
they wouldn't sustain 	I wouldn't be sustaining
you wouldn't be sustaining
he wouldn't be sustaining
we wouldn't be sustaining
you wouldn't be sustaining
they wouldn't be sustaining	I wouldn't have sustained
you wouldn't have sustained
he wouldn't have sustained
we wouldn't have sustained
you wouldn't have sustained
they wouldn't have sustained	I wouldn't have been sustaining
you wouldn't have been sustaining
he wouldn't have been sustaining
we wouldn't have been sustaining
you wouldn't have been sustaining
they wouldn't have been sustaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
would I sustain?
would you sustain?
would he sustain?
would we sustain?
would you sustain?
would they sustain? 	would I be sustaining?
would you be sustaining?
would he be sustaining?
would we be sustaining?
would you be sustaining?
would they be sustaining? 	would I have sustained?
would you have sustained?
would he have sustained?
would we have sustained?
would you have sustained?
would they have sustained? 	would I have been sustaining?
would you have been sustaining?
would he have been sustaining?
would we have been sustaining?
would you have been sustaining?
would they have been sustaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
wouldn't I sustain?
wouldn't you sustain?
wouldn't he sustain?
wouldn't we sustain?
wouldn't you sustain?
wouldn't they sustain? 	wouldn't I be sustaining?
wouldn't you be sustaining?
wouldn't he be sustaining?
wouldn't we be sustaining?
wouldn't you be sustaining?
wouldn't they be sustaining? 	wouldn't I have sustained?
wouldn't you have sustained?
wouldn't he have sustained?
wouldn't we have sustained?
wouldn't you have sustained?
wouldn't they have sustained? 	wouldn't I have been sustaining?
wouldn't you have been sustaining?
wouldn't he have been sustaining?
wouldn't we have been sustaining?
wouldn't you have been sustaining?
wouldn't they have been sustaining?