English verb conjugation COULD ALERT

Regular verb: alert - alerted - alerted


Affirmation

Simple form

I could alert
you could alert
he could alert
we could alert
you could alert
they could alert

V-ing form

I could be alerting
you could be alerting
he could be alerting
we could be alerting
you could be alerting
they could be alerting

Perfect

I could have alerted
you could have alerted
he could have alerted
we could have alerted
you could have alerted
they could have alerted

V-ing perfect

I could have been alerting
you could have been alerting
he could have been alerting
we could have been alerting
you could have been alerting
they could have been alerting

Negation

Simple form

I couldn't alert
you couldn't alert
he couldn't alert
we couldn't alert
you couldn't alert
they couldn't alert

V-ing form

I couldn't be alerting
you couldn't be alerting
he couldn't be alerting
we couldn't be alerting
you couldn't be alerting
they couldn't be alerting

Perfect

I couldn't have alerted
you couldn't have alerted
he couldn't have alerted
we couldn't have alerted
you couldn't have alerted
they couldn't have alerted

V-ing perfect

I couldn't have been alerting
you couldn't have been alerting
he couldn't have been alerting
we couldn't have been alerting
you couldn't have been alerting
they couldn't have been alerting

Interrogative form

Simple form

could I alert?
could you alert?
could he alert?
could we alert?
could you alert?
could they alert?

V-ing form

could I be alerting?
could you be alerting?
could he be alerting?
could we be alerting?
could you be alerting?
could they be alerting?

Perfect

could I have alerted?
could you have alerted?
could he have alerted?
could we have alerted?
could you have alerted?
could they have alerted?

V-ing perfect

could I have been alerting?
could you have been alerting?
could he have been alerting?
could we have been alerting?
could you have been alerting?
could they have been alerting?

Interro-negative form

Simple form

couldn't I alert?
couldn't you alert?
couldn't he alert?
couldn't we alert?
couldn't you alert?
couldn't they alert?

V-ing form

couldn't I be alerting?
couldn't you be alerting?
couldn't he be alerting?
couldn't we be alerting?
couldn't you be alerting?
couldn't they be alerting?

Perfect

couldn't I have alerted?
couldn't you have alerted?
couldn't he have alerted?
couldn't we have alerted?
couldn't you have alerted?
couldn't they have alerted?

V-ing perfect

couldn't I have been alerting?
couldn't you have been alerting?
couldn't he have been alerting?
couldn't we have been alerting?
couldn't you have been alerting?
couldn't they have been alerting?