English verb conjugation
CAN LAG

Regular verb: lag - lagged - lagged

Affirmation

Simple form	V-ing form
I can lag you can lag he can lag we can lag you can lag they can lag	I can be lagging you can be lagging he can be lagging we can be lagging you can be lagging they can be lagging
Perfect	V-ing perfect
I can have lagged you can have lagged he can have lagged we can have lagged you can have lagged they can have lagged	I can have been lagging you can have been lagging he can have been lagging we can have been lagging you can have been lagging they can have been lagging

Negation

Simple form	V-ing form
I can't lag you can't lag he can't lag we can't lag you can't lag they can't lag	I can't be lagging you can't be lagging he can't be lagging we can't be lagging you can't be lagging they can't be lagging
Perfect	V-ing perfect
I can't have lagged you can't have lagged he can't have lagged we can't have lagged you can't have lagged they can't have lagged	I can't have been lagging you can't have been lagging he can't have been lagging we can't have been lagging you can't have been lagging they can't have been lagging

Interrogative form

Simple form	V-ing form
can I lag? can you lag? can he lag? can we lag? can you lag? can they lag?	can I be lagging? can you be lagging? can he be lagging? can we be lagging? can you be lagging? can they be lagging?
Perfect	V-ing perfect
can I have lagged? can you have lagged? can he have lagged? can we have lagged? can you have lagged? can they have lagged?	can I have been lagging? can you have been lagging? can he have been lagging? can we have been lagging? can you have been lagging? can they have been lagging?

Interro-negative form

Simple form	V-ing form
can't I lag? can't you lag? can't he lag? can't we lag? can't you lag? can't they lag?	can't I be lagging? can't you be lagging? can't he be lagging? can't we be lagging? can't you be lagging? can't they be lagging?
Perfect	V-ing perfect
can't I have lagged? can't you have lagged? can't he have lagged? can't we have lagged? can't you have lagged? can't they have lagged?	can't I have been lagging? can't you have been lagging? can't he have been lagging? can't we have been lagging? can't you have been lagging? can't they have been lagging?