can drum
Regular verb: drum - drummed- drummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can drum
you can drum
she can drum
we can drum
you can drum
they can drum 	I can be drumming
you can be drumming
she can be drumming
we can be drumming
you can be drumming
they can be drumming	I can have drummed
you can have drummed
she can have drummed
we can have drummed
you can have drummed
they can have drummed	I can have been drumming
you can have been drumming
she can have been drumming
we can have been drumming
you can have been drumming
they can have been drumming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't drum
you can't drum
she can't drum
we can't drum
you can't drum
they can't drum 	I can't be drumming
you can't be drumming
she can't be drumming
we can't be drumming
you can't be drumming
they can't be drumming	I can't have drummed
you can't have drummed
she can't have drummed
we can't have drummed
you can't have drummed
they can't have drummed	I can't have been drumming
you can't have been drumming
she can't have been drumming
we can't have been drumming
you can't have been drumming
they can't have been drumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I drum?
can you drum?
can she drum?
can we drum?
can you drum?
can they drum? 	can I be drumming?
can you be drumming?
can she be drumming?
can we be drumming?
can you be drumming?
can they be drumming? 	can I have drummed?
can you have drummed?
can she have drummed?
can we have drummed?
can you have drummed?
can they have drummed? 	can I have been drumming?
can you have been drumming?
can she have been drumming?
can we have been drumming?
can you have been drumming?
can they have been drumming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I drum?
can't you drum?
can't she drum?
can't we drum?
can't you drum?
can't they drum? 	can't I be drumming?
can't you be drumming?
can't she be drumming?
can't we be drumming?
can't you be drumming?
can't they be drumming? 	can't I have drummed?
can't you have drummed?
can't she have drummed?
can't we have drummed?
can't you have drummed?
can't they have drummed? 	can't I have been drumming?
can't you have been drumming?
can't she have been drumming?
can't we have been drumming?
can't you have been drumming?
can't they have been drumming?