I could depressurise you could depressurise he could depressurise we could depressurise you could depressurise they could depressurise
V-ing form
I could be depressurising you could be depressurising he could be depressurising we could be depressurising you could be depressurising they could be depressurising
Perfect
I could have depressurised you could have depressurised he could have depressurised we could have depressurised you could have depressurised they could have depressurised
V-ing perfect
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
I could not depressurise you could not depressurise he could not depressurise we could not depressurise you could not depressurise they could not depressurise
V-ing form
I could not be depressurising you could not be depressurising he could not be depressurising we could not be depressurising you could not be depressurising they could not be depressurising
Perfect
I could not have depressurised you could not have depressurised he could not have depressurised we could not have depressurised you could not have depressurised they could not have depressurised
V-ing perfect
I could not have been depressurising you could not have been depressurising he could not have been depressurising we could not have been depressurising you could not have been depressurising they could not have been depressurising
Interrogative form
Simple form
could I depressurise? could you depressurise? could he depressurise? could we depressurise? could you depressurise? could they depressurise?
V-ing form
could I be depressurising? could you be depressurising? could he be depressurising? could we be depressurising? could you be depressurising? could they be depressurising?
Perfect
could I have depressurised? could you have depressurised? could he have depressurised? could we have depressurised? could you have depressurised? could they have depressurised?
V-ing perfect
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
could I not depressurise? could you not depressurise? could he not depressurise? could we not depressurise? could you not depressurise? could they not depressurise?
V-ing form
could I not be depressurising? could you not be depressurising? could he not be depressurising? could we not be depressurising? could you not be depressurising? could they not be depressurising?
Perfect
could I not have depressurised? could you not have depressurised? could he not have depressurised? could we not have depressurised? could you not have depressurised? could they not have depressurised?
V-ing perfect
could I not have been depressurising? could you not have been depressurising? could he not have been depressurising? could we not have been depressurising? could you not have been depressurising? could they not have been depressurising?