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 can't customize you can't customize he can't customize we can't customize you can't customize they can't customize	I can't be customizing you can't be customizing he can't be customizing we can't be customizing you can't be customizing they can't be customizing
Perfect	V-ing perfect
I can't have customized you can't have customized he can't have customized we can't have customized you can't have customized they can't have customized	I can't have been customizing you can't have been customizing he can't have been customizing we can't have been customizing you can't have been customizing they can't 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't I customize? can't you customize? can't he customize? can't we customize? can't you customize? can't they customize?	can't I be customizing? can't you be customizing? can't he be customizing? can't we be customizing? can't you be customizing? can't they be customizing?
Perfect	V-ing perfect
can't I have customized? can't you have customized? can't he have customized? can't we have customized? can't you have customized? can't they have customized?	can't I have been customizing? can't you have been customizing? can't he have been customizing? can't we have been customizing? can't you have been customizing? can't they have been customizing?