I can escalate you can escalate he can escalate we can escalate you can escalate they can escalate
V-ing form
I can be escalating you can be escalating he can be escalating we can be escalating you can be escalating they can be escalating
Perfect
I can have escalated you can have escalated he 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 he 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 he 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 he 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 he 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 he 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 he escalate? can we escalate? can you escalate? can they escalate?
V-ing form
can I be escalating? can you be escalating? can he be escalating? can we be escalating? can you be escalating? can they be escalating?
Perfect
can I have escalated? can you have escalated? can he 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 he 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 he 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 he 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 he 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 he have been escalating? can't we have been escalating? can't you have been escalating? can't they have been escalating?