can drum
Regular verb: drum - drummed- drummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can drum
you can drum
he can drum
we can drum
you can drum
they can drum 	I can be drumming
you can be drumming
he can be drumming
we can be drumming
you can be drumming
they can be drumming	I can have drummed
you can have drummed
he 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
he 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 cannot drum
you cannot drum
he cannot drum
we cannot drum
you cannot drum
they cannot drum 	I cannot be drumming
you cannot be drumming
he cannot be drumming
we cannot be drumming
you cannot be drumming
they cannot be drumming	I cannot have drummed
you cannot have drummed
he cannot have drummed
we cannot have drummed
you cannot have drummed
they cannot have drummed	I cannot have been drumming
you cannot have been drumming
he cannot have been drumming
we cannot have been drumming
you cannot have been drumming
they cannot have been drumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I drum?
can you drum?
can he drum?
can we drum?
can you drum?
can they drum? 	can I be drumming?
can you be drumming?
can he be drumming?
can we be drumming?
can you be drumming?
can they be drumming? 	can I have drummed?
can you have drummed?
can he 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 he 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 I not drum?
can you not drum?
can he not drum?
can we not drum?
can you not drum?
can they not drum? 	can I not be drumming?
can you not be drumming?
can he not be drumming?
can we not be drumming?
can you not be drumming?
can they not be drumming? 	can I not have drummed?
can you not have drummed?
can he not have drummed?
can we not have drummed?
can you not have drummed?
can they not have drummed? 	can I not have been drumming?
can you not have been drumming?
can he not have been drumming?
can we not have been drumming?
can you not have been drumming?
can they not have been drumming?