I can oblige you can oblige he can oblige we can oblige you can oblige they can oblige
V-ing form
I can be obliging you can be obliging he can be obliging we can be obliging you can be obliging they can be obliging
Perfect
I can have obliged you can have obliged he can have obliged we can have obliged you can have obliged they can have obliged
V-ing perfect
I can have been obliging you can have been obliging he can have been obliging we can have been obliging you can have been obliging they can have been obliging
Negation
Simple form
I cannot oblige you cannot oblige he cannot oblige we cannot oblige you cannot oblige they cannot oblige
V-ing form
I cannot be obliging you cannot be obliging he cannot be obliging we cannot be obliging you cannot be obliging they cannot be obliging
Perfect
I cannot have obliged you cannot have obliged he cannot have obliged we cannot have obliged you cannot have obliged they cannot have obliged
V-ing perfect
I cannot have been obliging you cannot have been obliging he cannot have been obliging we cannot have been obliging you cannot have been obliging they cannot have been obliging
Interrogative form
Simple form
can I oblige? can you oblige? can he oblige? can we oblige? can you oblige? can they oblige?
V-ing form
can I be obliging? can you be obliging? can he be obliging? can we be obliging? can you be obliging? can they be obliging?
Perfect
can I have obliged? can you have obliged? can he have obliged? can we have obliged? can you have obliged? can they have obliged?
V-ing perfect
can I have been obliging? can you have been obliging? can he have been obliging? can we have been obliging? can you have been obliging? can they have been obliging?
Interro-negative form
Simple form
can I not oblige? can you not oblige? can he not oblige? can we not oblige? can you not oblige? can they not oblige?
V-ing form
can I not be obliging? can you not be obliging? can he not be obliging? can we not be obliging? can you not be obliging? can they not be obliging?
Perfect
can I not have obliged? can you not have obliged? can he not have obliged? can we not have obliged? can you not have obliged? can they not have obliged?
V-ing perfect
can I not have been obliging? can you not have been obliging? can he not have been obliging? can we not have been obliging? can you not have been obliging? can they not have been obliging?