I can commence you can commence he can commence we can commence you can commence they can commence
Forma con V-ing
I can be commencing you can be commencing he can be commencing we can be commencing you can be commencing they can be commencing
Perfecto
I can have commenced you can have commenced he can have commenced we can have commenced you can have commenced they can have commenced
Perfecto con V-ing
I can have been commencing you can have been commencing he can have been commencing we can have been commencing you can have been commencing they can have been commencing
Negación
Forma simple
I can't commence you can't commence he can't commence we can't commence you can't commence they can't commence
Forma con V-ing
I can't be commencing you can't be commencing he can't be commencing we can't be commencing you can't be commencing they can't be commencing
Perfecto
I can't have commenced you can't have commenced he can't have commenced we can't have commenced you can't have commenced they can't have commenced
Perfecto con V-ing
I can't have been commencing you can't have been commencing he can't have been commencing we can't have been commencing you can't have been commencing they can't have been commencing
Forma interrogativa
Forma simple
can I commence? can you commence? can he commence? can we commence? can you commence? can they commence?
Forma con V-ing
can I be commencing? can you be commencing? can he be commencing? can we be commencing? can you be commencing? can they be commencing?
Perfecto
can I have commenced? can you have commenced? can he have commenced? can we have commenced? can you have commenced? can they have commenced?
Perfecto con V-ing
can I have been commencing? can you have been commencing? can he have been commencing? can we have been commencing? can you have been commencing? can they have been commencing?
Forma interro-negativa
Forma simple
can't I commence? can't you commence? can't he commence? can't we commence? can't you commence? can't they commence?
Forma con V-ing
can't I be commencing? can't you be commencing? can't he be commencing? can't we be commencing? can't you be commencing? can't they be commencing?
Perfecto
can't I have commenced? can't you have commenced? can't he have commenced? can't we have commenced? can't you have commenced? can't they have commenced?
Perfecto con V-ing
can't I have been commencing? can't you have been commencing? can't he have been commencing? can't we have been commencing? can't you have been commencing? can't they have been commencing?