English verb conjugation
CAN GUARD

Regular verb: guard - guarded - guarded

Affirmation

Simple form	V-ing form
I can guard you can guard he can guard we can guard you can guard they can guard	I can be guarding you can be guarding he can be guarding we can be guarding you can be guarding they can be guarding
Perfect	V-ing perfect
I can have guarded you can have guarded he can have guarded we can have guarded you can have guarded they can have guarded	I can have been guarding you can have been guarding he can have been guarding we can have been guarding you can have been guarding they can have been guarding

Negation

Simple form	V-ing form
I can't guard you can't guard he can't guard we can't guard you can't guard they can't guard	I can't be guarding you can't be guarding he can't be guarding we can't be guarding you can't be guarding they can't be guarding
Perfect	V-ing perfect
I can't have guarded you can't have guarded he can't have guarded we can't have guarded you can't have guarded they can't have guarded	I can't have been guarding you can't have been guarding he can't have been guarding we can't have been guarding you can't have been guarding they can't have been guarding

Interrogative form

Simple form	V-ing form
can I guard? can you guard? can he guard? can we guard? can you guard? can they guard?	can I be guarding? can you be guarding? can he be guarding? can we be guarding? can you be guarding? can they be guarding?
Perfect	V-ing perfect
can I have guarded? can you have guarded? can he have guarded? can we have guarded? can you have guarded? can they have guarded?	can I have been guarding? can you have been guarding? can he have been guarding? can we have been guarding? can you have been guarding? can they have been guarding?

Interro-negative form

Simple form	V-ing form
can't I guard? can't you guard? can't he guard? can't we guard? can't you guard? can't they guard?	can't I be guarding? can't you be guarding? can't he be guarding? can't we be guarding? can't you be guarding? can't they be guarding?
Perfect	V-ing perfect
can't I have guarded? can't you have guarded? can't he have guarded? can't we have guarded? can't you have guarded? can't they have guarded?	can't I have been guarding? can't you have been guarding? can't he have been guarding? can't we have been guarding? can't you have been guarding? can't they have been guarding?