I can start you can start he can start we can start you can start they can start
Forma con V-ing
I can be starting you can be starting he can be starting we can be starting you can be starting they can be starting
Perfecto
I can have started you can have started he can have started we can have started you can have started they can have started
Perfecto con V-ing
I can have been starting you can have been starting he can have been starting we can have been starting you can have been starting they can have been starting
Negación
Forma simple
I can't start you can't start he can't start we can't start you can't start they can't start
Forma con V-ing
I can't be starting you can't be starting he can't be starting we can't be starting you can't be starting they can't be starting
Perfecto
I can't have started you can't have started he can't have started we can't have started you can't have started they can't have started
Perfecto con V-ing
I can't have been starting you can't have been starting he can't have been starting we can't have been starting you can't have been starting they can't have been starting
Forma interrogativa
Forma simple
can I start? can you start? can he start? can we start? can you start? can they start?
Forma con V-ing
can I be starting? can you be starting? can he be starting? can we be starting? can you be starting? can they be starting?
Perfecto
can I have started? can you have started? can he have started? can we have started? can you have started? can they have started?
Perfecto con V-ing
can I have been starting? can you have been starting? can he have been starting? can we have been starting? can you have been starting? can they have been starting?
Forma interro-negativa
Forma simple
can't I start? can't you start? can't he start? can't we start? can't you start? can't they start?
Forma con V-ing
can't I be starting? can't you be starting? can't he be starting? can't we be starting? can't you be starting? can't they be starting?
Perfecto
can't I have started? can't you have started? can't he have started? can't we have started? can't you have started? can't they have started?
Perfecto con V-ing
can't I have been starting? can't you have been starting? can't he have been starting? can't we have been starting? can't you have been starting? can't they have been starting?