I could escalate you could escalate he could escalate we could escalate you could escalate they could escalate
V-ing form
I could be escalating you could be escalating he could be escalating we could be escalating you could be escalating they could be escalating
Perfect
I could have escalated you could have escalated he could have escalated we could have escalated you could have escalated they could have escalated
V-ing perfect
I could have been escalating you could have been escalating he could have been escalating we could have been escalating you could have been escalating they could have been escalating
Negation
Simple form
I could not escalate you could not escalate he could not escalate we could not escalate you could not escalate they could not escalate
V-ing form
I could not be escalating you could not be escalating he could not be escalating we could not be escalating you could not be escalating they could not be escalating
Perfect
I could not have escalated you could not have escalated he could not have escalated we could not have escalated you could not have escalated they could not have escalated
V-ing perfect
I could not have been escalating you could not have been escalating he could not have been escalating we could not have been escalating you could not have been escalating they could not have been escalating
Interrogative form
Simple form
could I escalate? could you escalate? could he escalate? could we escalate? could you escalate? could they escalate?
V-ing form
could I be escalating? could you be escalating? could he be escalating? could we be escalating? could you be escalating? could they be escalating?
Perfect
could I have escalated? could you have escalated? could he have escalated? could we have escalated? could you have escalated? could they have escalated?
V-ing perfect
could I have been escalating? could you have been escalating? could he have been escalating? could we have been escalating? could you have been escalating? could they have been escalating?
Interro-negative form
Simple form
could I not escalate? could you not escalate? could he not escalate? could we not escalate? could you not escalate? could they not escalate?
V-ing form
could I not be escalating? could you not be escalating? could he not be escalating? could we not be escalating? could you not be escalating? could they not be escalating?
Perfect
could I not have escalated? could you not have escalated? could he not have escalated? could we not have escalated? could you not have escalated? could they not have escalated?
V-ing perfect
could I not have been escalating? could you not have been escalating? could he not have been escalating? could we not have been escalating? could you not have been escalating? could they not have been escalating?