English verb conjugation
COULD CUSTOMISE

Regular verb: customise - customised - customised

Affirmation

Simple form	V-ing form
I could customise you could customise he could customise we could customise you could customise they could customise	I could be customising you could be customising he could be customising we could be customising you could be customising they could be customising
Perfect	V-ing perfect
I could have customised you could have customised he could have customised we could have customised you could have customised they could have customised	I could have been customising you could have been customising he could have been customising we could have been customising you could have been customising they could have been customising

Negation

Simple form	V-ing form
I could not customise you could not customise he could not customise we could not customise you could not customise they could not customise	I could not be customising you could not be customising he could not be customising we could not be customising you could not be customising they could not be customising
Perfect	V-ing perfect
I could not have customised you could not have customised he could not have customised we could not have customised you could not have customised they could not have customised	I could not have been customising you could not have been customising he could not have been customising we could not have been customising you could not have been customising they could not have been customising

Interrogative form

Simple form	V-ing form
could I customise? could you customise? could he customise? could we customise? could you customise? could they customise?	could I be customising? could you be customising? could he be customising? could we be customising? could you be customising? could they be customising?
Perfect	V-ing perfect
could I have customised? could you have customised? could he have customised? could we have customised? could you have customised? could they have customised?	could I have been customising? could you have been customising? could he have been customising? could we have been customising? could you have been customising? could they have been customising?

Interro-negative form

Simple form	V-ing form
could I not customise? could you not customise? could he not customise? could we not customise? could you not customise? could they not customise?	could I not be customising? could you not be customising? could he not be customising? could we not be customising? could you not be customising? could they not be customising?
Perfect	V-ing perfect
could I not have customised? could you not have customised? could he not have customised? could we not have customised? could you not have customised? could they not have customised?	could I not have been customising? could you not have been customising? could he not have been customising? could we not have been customising? could you not have been customising? could they not have been customising?