English verb conjugation
CAN CUSTOMIZE

Regular verb: customize - customized - customized

Affirmation

Simple form	V-ing form
I can customize you can customize he can customize we can customize you can customize they can customize	I can be customizing you can be customizing he can be customizing we can be customizing you can be customizing they can be customizing
Perfect	V-ing perfect
I can have customized you can have customized he can have customized we can have customized you can have customized they can have customized	I can have been customizing you can have been customizing he can have been customizing we can have been customizing you can have been customizing they can have been customizing

Negation

Simple form	V-ing form
I cannot customize you cannot customize he cannot customize we cannot customize you cannot customize they cannot customize	I cannot be customizing you cannot be customizing he cannot be customizing we cannot be customizing you cannot be customizing they cannot be customizing
Perfect	V-ing perfect
I cannot have customized you cannot have customized he cannot have customized we cannot have customized you cannot have customized they cannot have customized	I cannot have been customizing you cannot have been customizing he cannot have been customizing we cannot have been customizing you cannot have been customizing they cannot have been customizing

Interrogative form

Simple form	V-ing form
can I customize? can you customize? can he customize? can we customize? can you customize? can they customize?	can I be customizing? can you be customizing? can he be customizing? can we be customizing? can you be customizing? can they be customizing?
Perfect	V-ing perfect
can I have customized? can you have customized? can he have customized? can we have customized? can you have customized? can they have customized?	can I have been customizing? can you have been customizing? can he have been customizing? can we have been customizing? can you have been customizing? can they have been customizing?

Interro-negative form

Simple form	V-ing form
can I not customize? can you not customize? can he not customize? can we not customize? can you not customize? can they not customize?	can I not be customizing? can you not be customizing? can he not be customizing? can we not be customizing? can you not be customizing? can they not be customizing?
Perfect	V-ing perfect
can I not have customized? can you not have customized? can he not have customized? can we not have customized? can you not have customized? can they not have customized?	can I not have been customizing? can you not have been customizing? can he not have been customizing? can we not have been customizing? can you not have been customizing? can they not have been customizing?