English verb conjugation
CAN PROLONG

Regular verb: prolong - prolonged - prolonged

Affirmation

Simple form	V-ing form
I can prolong you can prolong he can prolong we can prolong you can prolong they can prolong	I can be prolonging you can be prolonging he can be prolonging we can be prolonging you can be prolonging they can be prolonging
Perfect	V-ing perfect
I can have prolonged you can have prolonged he can have prolonged we can have prolonged you can have prolonged they can have prolonged	I can have been prolonging you can have been prolonging he can have been prolonging we can have been prolonging you can have been prolonging they can have been prolonging

Negation

Simple form	V-ing form
I can't prolong you can't prolong he can't prolong we can't prolong you can't prolong they can't prolong	I can't be prolonging you can't be prolonging he can't be prolonging we can't be prolonging you can't be prolonging they can't be prolonging
Perfect	V-ing perfect
I can't have prolonged you can't have prolonged he can't have prolonged we can't have prolonged you can't have prolonged they can't have prolonged	I can't have been prolonging you can't have been prolonging he can't have been prolonging we can't have been prolonging you can't have been prolonging they can't have been prolonging

Interrogative form

Simple form	V-ing form
can I prolong? can you prolong? can he prolong? can we prolong? can you prolong? can they prolong?	can I be prolonging? can you be prolonging? can he be prolonging? can we be prolonging? can you be prolonging? can they be prolonging?
Perfect	V-ing perfect
can I have prolonged? can you have prolonged? can he have prolonged? can we have prolonged? can you have prolonged? can they have prolonged?	can I have been prolonging? can you have been prolonging? can he have been prolonging? can we have been prolonging? can you have been prolonging? can they have been prolonging?

Interro-negative form

Simple form	V-ing form
can't I prolong? can't you prolong? can't he prolong? can't we prolong? can't you prolong? can't they prolong?	can't I be prolonging? can't you be prolonging? can't he be prolonging? can't we be prolonging? can't you be prolonging? can't they be prolonging?
Perfect	V-ing perfect
can't I have prolonged? can't you have prolonged? can't he have prolonged? can't we have prolonged? can't you have prolonged? can't they have prolonged?	can't I have been prolonging? can't you have been prolonging? can't he have been prolonging? can't we have been prolonging? can't you have been prolonging? can't they have been prolonging?