I could obligate you could obligate he could obligate we could obligate you could obligate they could obligate
V-ing form
I could be obligating you could be obligating he could be obligating we could be obligating you could be obligating they could be obligating
Perfect
I could have obligated you could have obligated he could have obligated we could have obligated you could have obligated they could have obligated
V-ing perfect
I could have been obligating you could have been obligating he could have been obligating we could have been obligating you could have been obligating they could have been obligating
Negation
Simple form
I could not obligate you could not obligate he could not obligate we could not obligate you could not obligate they could not obligate
V-ing form
I could not be obligating you could not be obligating he could not be obligating we could not be obligating you could not be obligating they could not be obligating
Perfect
I could not have obligated you could not have obligated he could not have obligated we could not have obligated you could not have obligated they could not have obligated
V-ing perfect
I could not have been obligating you could not have been obligating he could not have been obligating we could not have been obligating you could not have been obligating they could not have been obligating
Interrogative form
Simple form
could I obligate? could you obligate? could he obligate? could we obligate? could you obligate? could they obligate?
V-ing form
could I be obligating? could you be obligating? could he be obligating? could we be obligating? could you be obligating? could they be obligating?
Perfect
could I have obligated? could you have obligated? could he have obligated? could we have obligated? could you have obligated? could they have obligated?
V-ing perfect
could I have been obligating? could you have been obligating? could he have been obligating? could we have been obligating? could you have been obligating? could they have been obligating?
Interro-negative form
Simple form
could I not obligate? could you not obligate? could he not obligate? could we not obligate? could you not obligate? could they not obligate?
V-ing form
could I not be obligating? could you not be obligating? could he not be obligating? could we not be obligating? could you not be obligating? could they not be obligating?
Perfect
could I not have obligated? could you not have obligated? could he not have obligated? could we not have obligated? could you not have obligated? could they not have obligated?
V-ing perfect
could I not have been obligating? could you not have been obligating? could he not have been obligating? could we not have been obligating? could you not have been obligating? could they not have been obligating?