English verb conjugation
CAN SCUBA

Regular verb: scuba - scubaed - scubaed

Affirmation

Simple form	V-ing form
I can scuba you can scuba he can scuba we can scuba you can scuba they can scuba	I can be scubaing you can be scubaing he can be scubaing we can be scubaing you can be scubaing they can be scubaing
Perfect	V-ing perfect
I can have scubaed you can have scubaed he can have scubaed we can have scubaed you can have scubaed they can have scubaed	I can have been scubaing you can have been scubaing he can have been scubaing we can have been scubaing you can have been scubaing they can have been scubaing

Negation

Simple form	V-ing form
I can't scuba you can't scuba he can't scuba we can't scuba you can't scuba they can't scuba	I can't be scubaing you can't be scubaing he can't be scubaing we can't be scubaing you can't be scubaing they can't be scubaing
Perfect	V-ing perfect
I can't have scubaed you can't have scubaed he can't have scubaed we can't have scubaed you can't have scubaed they can't have scubaed	I can't have been scubaing you can't have been scubaing he can't have been scubaing we can't have been scubaing you can't have been scubaing they can't have been scubaing

Interrogative form

Simple form	V-ing form
can I scuba? can you scuba? can he scuba? can we scuba? can you scuba? can they scuba?	can I be scubaing? can you be scubaing? can he be scubaing? can we be scubaing? can you be scubaing? can they be scubaing?
Perfect	V-ing perfect
can I have scubaed? can you have scubaed? can he have scubaed? can we have scubaed? can you have scubaed? can they have scubaed?	can I have been scubaing? can you have been scubaing? can he have been scubaing? can we have been scubaing? can you have been scubaing? can they have been scubaing?

Interro-negative form

Simple form	V-ing form
can't I scuba? can't you scuba? can't he scuba? can't we scuba? can't you scuba? can't they scuba?	can't I be scubaing? can't you be scubaing? can't he be scubaing? can't we be scubaing? can't you be scubaing? can't they be scubaing?
Perfect	V-ing perfect
can't I have scubaed? can't you have scubaed? can't he have scubaed? can't we have scubaed? can't you have scubaed? can't they have scubaed?	can't I have been scubaing? can't you have been scubaing? can't he have been scubaing? can't we have been scubaing? can't you have been scubaing? can't they have been scubaing?