can sandwich
Regular verb: sandwich - sandwiched- sandwiched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sandwich
you can sandwich
he can sandwich
we can sandwich
you can sandwich
they can sandwich 	I can be sandwiching
you can be sandwiching
he can be sandwiching
we can be sandwiching
you can be sandwiching
they can be sandwiching	I can have sandwiched
you can have sandwiched
he can have sandwiched
we can have sandwiched
you can have sandwiched
they can have sandwiched	I can have been sandwiching
you can have been sandwiching
he can have been sandwiching
we can have been sandwiching
you can have been sandwiching
they can have been sandwiching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sandwich
you can't sandwich
he can't sandwich
we can't sandwich
you can't sandwich
they can't sandwich 	I can't be sandwiching
you can't be sandwiching
he can't be sandwiching
we can't be sandwiching
you can't be sandwiching
they can't be sandwiching	I can't have sandwiched
you can't have sandwiched
he can't have sandwiched
we can't have sandwiched
you can't have sandwiched
they can't have sandwiched	I can't have been sandwiching
you can't have been sandwiching
he can't have been sandwiching
we can't have been sandwiching
you can't have been sandwiching
they can't have been sandwiching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sandwich?
can you sandwich?
can he sandwich?
can we sandwich?
can you sandwich?
can they sandwich? 	can I be sandwiching?
can you be sandwiching?
can he be sandwiching?
can we be sandwiching?
can you be sandwiching?
can they be sandwiching? 	can I have sandwiched?
can you have sandwiched?
can he have sandwiched?
can we have sandwiched?
can you have sandwiched?
can they have sandwiched? 	can I have been sandwiching?
can you have been sandwiching?
can he have been sandwiching?
can we have been sandwiching?
can you have been sandwiching?
can they have been sandwiching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sandwich?
can't you sandwich?
can't he sandwich?
can't we sandwich?
can't you sandwich?
can't they sandwich? 	can't I be sandwiching?
can't you be sandwiching?
can't he be sandwiching?
can't we be sandwiching?
can't you be sandwiching?
can't they be sandwiching? 	can't I have sandwiched?
can't you have sandwiched?
can't he have sandwiched?
can't we have sandwiched?
can't you have sandwiched?
can't they have sandwiched? 	can't I have been sandwiching?
can't you have been sandwiching?
can't he have been sandwiching?
can't we have been sandwiching?
can't you have been sandwiching?
can't they have been sandwiching?