English verb conjugation
COULD GUARD

Regular verb: guard - guarded - guarded

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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