I can escalate you can escalate she can escalate we can escalate you can escalate they can escalate
V-ing form
I can be escalating you can be escalating she can be escalating we can be escalating you can be escalating they can be escalating
Perfect
I can have escalated you can have escalated she can have escalated we can have escalated you can have escalated they can have escalated
V-ing perfect
I can have been escalating you can have been escalating she can have been escalating we can have been escalating you can have been escalating they can have been escalating
Negation
Simple form
I can't escalate you can't escalate she can't escalate we can't escalate you can't escalate they can't escalate
V-ing form
I can't be escalating you can't be escalating she can't be escalating we can't be escalating you can't be escalating they can't be escalating
Perfect
I can't have escalated you can't have escalated she can't have escalated we can't have escalated you can't have escalated they can't have escalated
V-ing perfect
I can't have been escalating you can't have been escalating she can't have been escalating we can't have been escalating you can't have been escalating they can't have been escalating
Interrogative form
Simple form
can I escalate? can you escalate? can she escalate? can we escalate? can you escalate? can they escalate?
V-ing form
can I be escalating? can you be escalating? can she be escalating? can we be escalating? can you be escalating? can they be escalating?
Perfect
can I have escalated? can you have escalated? can she have escalated? can we have escalated? can you have escalated? can they have escalated?
V-ing perfect
can I have been escalating? can you have been escalating? can she have been escalating? can we have been escalating? can you have been escalating? can they have been escalating?
Interro-negative form
Simple form
can't I escalate? can't you escalate? can't she escalate? can't we escalate? can't you escalate? can't they escalate?
V-ing form
can't I be escalating? can't you be escalating? can't she be escalating? can't we be escalating? can't you be escalating? can't they be escalating?
Perfect
can't I have escalated? can't you have escalated? can't she have escalated? can't we have escalated? can't you have escalated? can't they have escalated?
V-ing perfect
can't I have been escalating? can't you have been escalating? can't she have been escalating? can't we have been escalating? can't you have been escalating? can't they have been escalating?