English verb conjugation
CAN SAG

Regular verb: sag - sagged - sagged

Affirmation

Simple form	V-ing form
I can sag you can sag he can sag we can sag you can sag they can sag	I can be sagging you can be sagging he can be sagging we can be sagging you can be sagging they can be sagging
Perfect	V-ing perfect
I can have sagged you can have sagged he can have sagged we can have sagged you can have sagged they can have sagged	I can have been sagging you can have been sagging he can have been sagging we can have been sagging you can have been sagging they can have been sagging

Negation

Simple form	V-ing form
I can't sag you can't sag he can't sag we can't sag you can't sag they can't sag	I can't be sagging you can't be sagging he can't be sagging we can't be sagging you can't be sagging they can't be sagging
Perfect	V-ing perfect
I can't have sagged you can't have sagged he can't have sagged we can't have sagged you can't have sagged they can't have sagged	I can't have been sagging you can't have been sagging he can't have been sagging we can't have been sagging you can't have been sagging they can't have been sagging

Interrogative form

Simple form	V-ing form
can I sag? can you sag? can he sag? can we sag? can you sag? can they sag?	can I be sagging? can you be sagging? can he be sagging? can we be sagging? can you be sagging? can they be sagging?
Perfect	V-ing perfect
can I have sagged? can you have sagged? can he have sagged? can we have sagged? can you have sagged? can they have sagged?	can I have been sagging? can you have been sagging? can he have been sagging? can we have been sagging? can you have been sagging? can they have been sagging?

Interro-negative form

Simple form	V-ing form
can't I sag? can't you sag? can't he sag? can't we sag? can't you sag? can't they sag?	can't I be sagging? can't you be sagging? can't he be sagging? can't we be sagging? can't you be sagging? can't they be sagging?
Perfect	V-ing perfect
can't I have sagged? can't you have sagged? can't he have sagged? can't we have sagged? can't you have sagged? can't they have sagged?	can't I have been sagging? can't you have been sagging? can't he have been sagging? can't we have been sagging? can't you have been sagging? can't they have been sagging?