could depressurize
Regular verb: depressurize - depressurized- depressurized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could depressurize
you could depressurize
she could depressurize
we could depressurize
you could depressurize
they could depressurize 	I could be depressurizing
you could be depressurizing
she could be depressurizing
we could be depressurizing
you could be depressurizing
they could be depressurizing	I could have depressurized
you could have depressurized
she could have depressurized
we could have depressurized
you could have depressurized
they could have depressurized	I could have been depressurizing
you could have been depressurizing
she could have been depressurizing
we could have been depressurizing
you could have been depressurizing
they could have been depressurizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't depressurize
you couldn't depressurize
she couldn't depressurize
we couldn't depressurize
you couldn't depressurize
they couldn't depressurize 	I couldn't be depressurizing
you couldn't be depressurizing
she couldn't be depressurizing
we couldn't be depressurizing
you couldn't be depressurizing
they couldn't be depressurizing	I couldn't have depressurized
you couldn't have depressurized
she couldn't have depressurized
we couldn't have depressurized
you couldn't have depressurized
they couldn't have depressurized	I couldn't have been depressurizing
you couldn't have been depressurizing
she couldn't have been depressurizing
we couldn't have been depressurizing
you couldn't have been depressurizing
they couldn't have been depressurizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I depressurize?
could you depressurize?
could she depressurize?
could we depressurize?
could you depressurize?
could they depressurize? 	could I be depressurizing?
could you be depressurizing?
could she be depressurizing?
could we be depressurizing?
could you be depressurizing?
could they be depressurizing? 	could I have depressurized?
could you have depressurized?
could she have depressurized?
could we have depressurized?
could you have depressurized?
could they have depressurized? 	could I have been depressurizing?
could you have been depressurizing?
could she have been depressurizing?
could we have been depressurizing?
could you have been depressurizing?
could they have been depressurizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I depressurize?
couldn't you depressurize?
couldn't she depressurize?
couldn't we depressurize?
couldn't you depressurize?
couldn't they depressurize? 	couldn't I be depressurizing?
couldn't you be depressurizing?
couldn't she be depressurizing?
couldn't we be depressurizing?
couldn't you be depressurizing?
couldn't they be depressurizing? 	couldn't I have depressurized?
couldn't you have depressurized?
couldn't she have depressurized?
couldn't we have depressurized?
couldn't you have depressurized?
couldn't they have depressurized? 	couldn't I have been depressurizing?
couldn't you have been depressurizing?
couldn't she have been depressurizing?
couldn't we have been depressurizing?
couldn't you have been depressurizing?
couldn't they have been depressurizing?