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 couldn't customise you couldn't customise he couldn't customise we couldn't customise you couldn't customise they couldn't customise	I couldn't be customising you couldn't be customising he couldn't be customising we couldn't be customising you couldn't be customising they couldn't be customising
Perfect	V-ing perfect
I couldn't have customised you couldn't have customised he couldn't have customised we couldn't have customised you couldn't have customised they couldn't have customised	I couldn't have been customising you couldn't have been customising he couldn't have been customising we couldn't have been customising you couldn't have been customising they couldn't 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
couldn't I customise? couldn't you customise? couldn't he customise? couldn't we customise? couldn't you customise? couldn't they customise?	couldn't I be customising? couldn't you be customising? couldn't he be customising? couldn't we be customising? couldn't you be customising? couldn't they be customising?
Perfect	V-ing perfect
couldn't I have customised? couldn't you have customised? couldn't he have customised? couldn't we have customised? couldn't you have customised? couldn't they have customised?	couldn't I have been customising? couldn't you have been customising? couldn't he have been customising? couldn't we have been customising? couldn't you have been customising? couldn't they have been customising?