I can gripe you can gripe he can gripe we can gripe you can gripe they can gripe
V-ing form
I can be griping you can be griping he can be griping we can be griping you can be griping they can be griping
Perfect
I can have griped you can have griped he can have griped we can have griped you can have griped they can have griped
V-ing perfect
I can have been griping you can have been griping he can have been griping we can have been griping you can have been griping they can have been griping
Negation
Simple form
I cannot gripe you cannot gripe he cannot gripe we cannot gripe you cannot gripe they cannot gripe
V-ing form
I cannot be griping you cannot be griping he cannot be griping we cannot be griping you cannot be griping they cannot be griping
Perfect
I cannot have griped you cannot have griped he cannot have griped we cannot have griped you cannot have griped they cannot have griped
V-ing perfect
I cannot have been griping you cannot have been griping he cannot have been griping we cannot have been griping you cannot have been griping they cannot have been griping
Interrogative form
Simple form
can I gripe? can you gripe? can he gripe? can we gripe? can you gripe? can they gripe?
V-ing form
can I be griping? can you be griping? can he be griping? can we be griping? can you be griping? can they be griping?
Perfect
can I have griped? can you have griped? can he have griped? can we have griped? can you have griped? can they have griped?
V-ing perfect
can I have been griping? can you have been griping? can he have been griping? can we have been griping? can you have been griping? can they have been griping?
Interro-negative form
Simple form
can I not gripe? can you not gripe? can he not gripe? can we not gripe? can you not gripe? can they not gripe?
V-ing form
can I not be griping? can you not be griping? can he not be griping? can we not be griping? can you not be griping? can they not be griping?
Perfect
can I not have griped? can you not have griped? can he not have griped? can we not have griped? can you not have griped? can they not have griped?
V-ing perfect
can I not have been griping? can you not have been griping? can he not have been griping? can we not have been griping? can you not have been griping? can they not have been griping?