English verb conjugation
CAN SCUBA

Regular verb: scuba - scubaed - scubaed

Affirmation

Simple form	V-ing form
I can scuba you can scuba she can scuba we can scuba you can scuba they can scuba	I can be scubaing you can be scubaing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she scuba? can we scuba? can you scuba? can they scuba?	can I be scubaing? can you be scubaing? can she 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 she 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 she 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 she 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 she 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 she 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 she have been scubaing? can't we have been scubaing? can't you have been scubaing? can't they have been scubaing?