can sag
Regular verb: sag - sagged- sagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I cannot sag
you cannot sag
he cannot sag
we cannot sag
you cannot sag
they cannot sag 	I cannot be sagging
you cannot be sagging
he cannot be sagging
we cannot be sagging
you cannot be sagging
they cannot be sagging	I cannot have sagged
you cannot have sagged
he cannot have sagged
we cannot have sagged
you cannot have sagged
they cannot have sagged	I cannot have been sagging
you cannot have been sagging
he cannot have been sagging
we cannot have been sagging
you cannot have been sagging
they cannot have been sagging	

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