Regular verb: alert - alerted - alerted
Simple form | V-ing form |
I could alert you could alert he could alert we could alert you could alert they could alert | 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 | V-ing 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 | 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 |
Simple form | V-ing 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 | 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 | V-ing 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 | 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 |
Simple form | V-ing form |
could I alert? could you alert? could he alert? could we alert? could you alert? could they alert? | 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 | V-ing 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? | 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? |
Simple form | V-ing 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? | 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 | V-ing 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? | 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? |