I can alert you can alert he can alert we can alert you can alert they can alert
Forma con V-ing
I can be alerting you can be alerting he can be alerting we can be alerting you can be alerting they can be alerting
Perfecto
I can have alerted you can have alerted he can have alerted we can have alerted you can have alerted they can have alerted
Perfecto con V-ing
I can have been alerting you can have been alerting he can have been alerting we can have been alerting you can have been alerting they can have been alerting
Negación
Forma simple
I cannot alert you cannot alert he cannot alert we cannot alert you cannot alert they cannot alert
Forma con V-ing
I cannot be alerting you cannot be alerting he cannot be alerting we cannot be alerting you cannot be alerting they cannot be alerting
Perfecto
I cannot have alerted you cannot have alerted he cannot have alerted we cannot have alerted you cannot have alerted they cannot have alerted
Perfecto con V-ing
I cannot have been alerting you cannot have been alerting he cannot have been alerting we cannot have been alerting you cannot have been alerting they cannot have been alerting
Forma interrogativa
Forma simple
can I alert? can you alert? can he alert? can we alert? can you alert? can they alert?
Forma con V-ing
can I be alerting? can you be alerting? can he be alerting? can we be alerting? can you be alerting? can they be alerting?
Perfecto
can I have alerted? can you have alerted? can he have alerted? can we have alerted? can you have alerted? can they have alerted?
Perfecto con V-ing
can I have been alerting? can you have been alerting? can he have been alerting? can we have been alerting? can you have been alerting? can they have been alerting?
Forma interro-negativa
Forma simple
can I not alert? can you not alert? can he not alert? can we not alert? can you not alert? can they not alert?
Forma con V-ing
can I not be alerting? can you not be alerting? can he not be alerting? can we not be alerting? can you not be alerting? can they not be alerting?
Perfecto
can I not have alerted? can you not have alerted? can he not have alerted? can we not have alerted? can you not have alerted? can they not have alerted?
Perfecto con V-ing
can I not have been alerting? can you not have been alerting? can he not have been alerting? can we not have been alerting? can you not have been alerting? can they not have been alerting?