English verb conjugation
CAN CAPTAIN

Regular verb: captain - captained - captained

Affirmation

Simple form	V-ing form
I can captain you can captain he can captain we can captain you can captain they can captain	I can be captaining you can be captaining he can be captaining we can be captaining you can be captaining they can be captaining
Perfect	V-ing perfect
I can have captained you can have captained he can have captained we can have captained you can have captained they can have captained	I can have been captaining you can have been captaining he can have been captaining we can have been captaining you can have been captaining they can have been captaining

Negation

Simple form	V-ing form
I can't captain you can't captain he can't captain we can't captain you can't captain they can't captain	I can't be captaining you can't be captaining he can't be captaining we can't be captaining you can't be captaining they can't be captaining
Perfect	V-ing perfect
I can't have captained you can't have captained he can't have captained we can't have captained you can't have captained they can't have captained	I can't have been captaining you can't have been captaining he can't have been captaining we can't have been captaining you can't have been captaining they can't have been captaining

Interrogative form

Simple form	V-ing form
can I captain? can you captain? can he captain? can we captain? can you captain? can they captain?	can I be captaining? can you be captaining? can he be captaining? can we be captaining? can you be captaining? can they be captaining?
Perfect	V-ing perfect
can I have captained? can you have captained? can he have captained? can we have captained? can you have captained? can they have captained?	can I have been captaining? can you have been captaining? can he have been captaining? can we have been captaining? can you have been captaining? can they have been captaining?

Interro-negative form

Simple form	V-ing form
can't I captain? can't you captain? can't he captain? can't we captain? can't you captain? can't they captain?	can't I be captaining? can't you be captaining? can't he be captaining? can't we be captaining? can't you be captaining? can't they be captaining?
Perfect	V-ing perfect
can't I have captained? can't you have captained? can't he have captained? can't we have captained? can't you have captained? can't they have captained?	can't I have been captaining? can't you have been captaining? can't he have been captaining? can't we have been captaining? can't you have been captaining? can't they have been captaining?