I can cement you can cement she can cement we can cement you can cement they can cement
V-ing form
I can be cementing you can be cementing she can be cementing we can be cementing you can be cementing they can be cementing
Perfect
I can have cemented you can have cemented she can have cemented we can have cemented you can have cemented they can have cemented
V-ing perfect
I can have been cementing you can have been cementing she can have been cementing we can have been cementing you can have been cementing they can have been cementing
Negation
Simple form
I can't cement you can't cement she can't cement we can't cement you can't cement they can't cement
V-ing form
I can't be cementing you can't be cementing she can't be cementing we can't be cementing you can't be cementing they can't be cementing
Perfect
I can't have cemented you can't have cemented she can't have cemented we can't have cemented you can't have cemented they can't have cemented
V-ing perfect
I can't have been cementing you can't have been cementing she can't have been cementing we can't have been cementing you can't have been cementing they can't have been cementing
Interrogative form
Simple form
can I cement? can you cement? can she cement? can we cement? can you cement? can they cement?
V-ing form
can I be cementing? can you be cementing? can she be cementing? can we be cementing? can you be cementing? can they be cementing?
Perfect
can I have cemented? can you have cemented? can she have cemented? can we have cemented? can you have cemented? can they have cemented?
V-ing perfect
can I have been cementing? can you have been cementing? can she have been cementing? can we have been cementing? can you have been cementing? can they have been cementing?
Interro-negative form
Simple form
can't I cement? can't you cement? can't she cement? can't we cement? can't you cement? can't they cement?
V-ing form
can't I be cementing? can't you be cementing? can't she be cementing? can't we be cementing? can't you be cementing? can't they be cementing?
Perfect
can't I have cemented? can't you have cemented? can't she have cemented? can't we have cemented? can't you have cemented? can't they have cemented?
V-ing perfect
can't I have been cementing? can't you have been cementing? can't she have been cementing? can't we have been cementing? can't you have been cementing? can't they have been cementing?