can start
Regular verb: start - started- started

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can start
you can start
she can start
we can start
you can start
they can start 	I can be starting
you can be starting
she can be starting
we can be starting
you can be starting
they can be starting	I can have started
you can have started
she can have started
we can have started
you can have started
they can have started	I can have been starting
you can have been starting
she can have been starting
we can have been starting
you can have been starting
they can have been starting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot start
you cannot start
she cannot start
we cannot start
you cannot start
they cannot start 	I cannot be starting
you cannot be starting
she cannot be starting
we cannot be starting
you cannot be starting
they cannot be starting	I cannot have started
you cannot have started
she cannot have started
we cannot have started
you cannot have started
they cannot have started	I cannot have been starting
you cannot have been starting
she cannot have been starting
we cannot have been starting
you cannot have been starting
they cannot have been starting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I start?
can you start?
can she start?
can we start?
can you start?
can they start? 	can I be starting?
can you be starting?
can she be starting?
can we be starting?
can you be starting?
can they be starting? 	can I have started?
can you have started?
can she have started?
can we have started?
can you have started?
can they have started? 	can I have been starting?
can you have been starting?
can she have been starting?
can we have been starting?
can you have been starting?
can they have been starting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not start?
can you not start?
can she not start?
can we not start?
can you not start?
can they not start? 	can I not be starting?
can you not be starting?
can she not be starting?
can we not be starting?
can you not be starting?
can they not be starting? 	can I not have started?
can you not have started?
can she not have started?
can we not have started?
can you not have started?
can they not have started? 	can I not have been starting?
can you not have been starting?
can she not have been starting?
can we not have been starting?
can you not have been starting?
can they not have been starting?