I could impact you could impact he could impact we could impact you could impact they could impact
V-ing form
I could be impacting you could be impacting he could be impacting we could be impacting you could be impacting they could be impacting
Perfect
I could have impacted you could have impacted he could have impacted we could have impacted you could have impacted they could have impacted
V-ing perfect
I could have been impacting you could have been impacting he could have been impacting we could have been impacting you could have been impacting they could have been impacting
Negation
Simple form
I couldn't impact you couldn't impact he couldn't impact we couldn't impact you couldn't impact they couldn't impact
V-ing form
I couldn't be impacting you couldn't be impacting he couldn't be impacting we couldn't be impacting you couldn't be impacting they couldn't be impacting
Perfect
I couldn't have impacted you couldn't have impacted he couldn't have impacted we couldn't have impacted you couldn't have impacted they couldn't have impacted
V-ing perfect
I couldn't have been impacting you couldn't have been impacting he couldn't have been impacting we couldn't have been impacting you couldn't have been impacting they couldn't have been impacting
Interrogative form
Simple form
could I impact? could you impact? could he impact? could we impact? could you impact? could they impact?
V-ing form
could I be impacting? could you be impacting? could he be impacting? could we be impacting? could you be impacting? could they be impacting?
Perfect
could I have impacted? could you have impacted? could he have impacted? could we have impacted? could you have impacted? could they have impacted?
V-ing perfect
could I have been impacting? could you have been impacting? could he have been impacting? could we have been impacting? could you have been impacting? could they have been impacting?
Interro-negative form
Simple form
couldn't I impact? couldn't you impact? couldn't he impact? couldn't we impact? couldn't you impact? couldn't they impact?
V-ing form
couldn't I be impacting? couldn't you be impacting? couldn't he be impacting? couldn't we be impacting? couldn't you be impacting? couldn't they be impacting?
Perfect
couldn't I have impacted? couldn't you have impacted? couldn't he have impacted? couldn't we have impacted? couldn't you have impacted? couldn't they have impacted?
V-ing perfect
couldn't I have been impacting? couldn't you have been impacting? couldn't he have been impacting? couldn't we have been impacting? couldn't you have been impacting? couldn't they have been impacting?