English verb conjugation
CAN START

Regular verb: start - started - started

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?