could alert
Verbo regular: alert - alerted- alerted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could alert
you could alert
she could alert
we could alert
you could alert
they could alert 	I could be alerting
you could be alerting
she could be alerting
we could be alerting
you could be alerting
they could be alerting	I could have alerted
you could have alerted
she could have alerted
we could have alerted
you could have alerted
they could have alerted	I could have been alerting
you could have been alerting
she could have been alerting
we could have been alerting
you could have been alerting
they could have been alerting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't alert
you couldn't alert
she couldn't alert
we couldn't alert
you couldn't alert
they couldn't alert 	I couldn't be alerting
you couldn't be alerting
she couldn't be alerting
we couldn't be alerting
you couldn't be alerting
they couldn't be alerting	I couldn't have alerted
you couldn't have alerted
she couldn't have alerted
we couldn't have alerted
you couldn't have alerted
they couldn't have alerted	I couldn't have been alerting
you couldn't have been alerting
she couldn't have been alerting
we couldn't have been alerting
you couldn't have been alerting
they couldn't have been alerting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I alert?
could you alert?
could she alert?
could we alert?
could you alert?
could they alert? 	could I be alerting?
could you be alerting?
could she be alerting?
could we be alerting?
could you be alerting?
could they be alerting? 	could I have alerted?
could you have alerted?
could she have alerted?
could we have alerted?
could you have alerted?
could they have alerted? 	could I have been alerting?
could you have been alerting?
could she have been alerting?
could we have been alerting?
could you have been alerting?
could they have been alerting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I alert?
couldn't you alert?
couldn't she alert?
couldn't we alert?
couldn't you alert?
couldn't they alert? 	couldn't I be alerting?
couldn't you be alerting?
couldn't she be alerting?
couldn't we be alerting?
couldn't you be alerting?
couldn't they be alerting? 	couldn't I have alerted?
couldn't you have alerted?
couldn't she have alerted?
couldn't we have alerted?
couldn't you have alerted?
couldn't they have alerted? 	couldn't I have been alerting?
couldn't you have been alerting?
couldn't she have been alerting?
couldn't we have been alerting?
couldn't you have been alerting?
couldn't they have been alerting?