could depressurise
Regular verb: depressurise - depressurised- depressurised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could depressurise
you could depressurise
he could depressurise
we could depressurise
you could depressurise
they could depressurise 	I could be depressurising
you could be depressurising
he could be depressurising
we could be depressurising
you could be depressurising
they could be depressurising	I could have depressurised
you could have depressurised
he could have depressurised
we could have depressurised
you could have depressurised
they could have depressurised	I could have been depressurising
you could have been depressurising
he could have been depressurising
we could have been depressurising
you could have been depressurising
they could have been depressurising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't depressurise
you couldn't depressurise
he couldn't depressurise
we couldn't depressurise
you couldn't depressurise
they couldn't depressurise 	I couldn't be depressurising
you couldn't be depressurising
he couldn't be depressurising
we couldn't be depressurising
you couldn't be depressurising
they couldn't be depressurising	I couldn't have depressurised
you couldn't have depressurised
he couldn't have depressurised
we couldn't have depressurised
you couldn't have depressurised
they couldn't have depressurised	I couldn't have been depressurising
you couldn't have been depressurising
he couldn't have been depressurising
we couldn't have been depressurising
you couldn't have been depressurising
they couldn't have been depressurising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I depressurise?
could you depressurise?
could he depressurise?
could we depressurise?
could you depressurise?
could they depressurise? 	could I be depressurising?
could you be depressurising?
could he be depressurising?
could we be depressurising?
could you be depressurising?
could they be depressurising? 	could I have depressurised?
could you have depressurised?
could he have depressurised?
could we have depressurised?
could you have depressurised?
could they have depressurised? 	could I have been depressurising?
could you have been depressurising?
could he have been depressurising?
could we have been depressurising?
could you have been depressurising?
could they have been depressurising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I depressurise?
couldn't you depressurise?
couldn't he depressurise?
couldn't we depressurise?
couldn't you depressurise?
couldn't they depressurise? 	couldn't I be depressurising?
couldn't you be depressurising?
couldn't he be depressurising?
couldn't we be depressurising?
couldn't you be depressurising?
couldn't they be depressurising? 	couldn't I have depressurised?
couldn't you have depressurised?
couldn't he have depressurised?
couldn't we have depressurised?
couldn't you have depressurised?
couldn't they have depressurised? 	couldn't I have been depressurising?
couldn't you have been depressurising?
couldn't he have been depressurising?
couldn't we have been depressurising?
couldn't you have been depressurising?
couldn't they have been depressurising?