can comb
Regular verb: comb - combed- combed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can comb
you can comb
she can comb
we can comb
you can comb
they can comb 	I can be combing
you can be combing
she can be combing
we can be combing
you can be combing
they can be combing	I can have combed
you can have combed
she can have combed
we can have combed
you can have combed
they can have combed	I can have been combing
you can have been combing
she can have been combing
we can have been combing
you can have been combing
they can have been combing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't comb
you can't comb
she can't comb
we can't comb
you can't comb
they can't comb 	I can't be combing
you can't be combing
she can't be combing
we can't be combing
you can't be combing
they can't be combing	I can't have combed
you can't have combed
she can't have combed
we can't have combed
you can't have combed
they can't have combed	I can't have been combing
you can't have been combing
she can't have been combing
we can't have been combing
you can't have been combing
they can't have been combing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I comb?
can you comb?
can she comb?
can we comb?
can you comb?
can they comb? 	can I be combing?
can you be combing?
can she be combing?
can we be combing?
can you be combing?
can they be combing? 	can I have combed?
can you have combed?
can she have combed?
can we have combed?
can you have combed?
can they have combed? 	can I have been combing?
can you have been combing?
can she have been combing?
can we have been combing?
can you have been combing?
can they have been combing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I comb?
can't you comb?
can't she comb?
can't we comb?
can't you comb?
can't they comb? 	can't I be combing?
can't you be combing?
can't she be combing?
can't we be combing?
can't you be combing?
can't they be combing? 	can't I have combed?
can't you have combed?
can't she have combed?
can't we have combed?
can't you have combed?
can't they have combed? 	can't I have been combing?
can't you have been combing?
can't she have been combing?
can't we have been combing?
can't you have been combing?
can't they have been combing?