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