I can bow you can bow he can bow we can bow you can bow they can bow
V-ing form
I can be bowing you can be bowing he can be bowing we can be bowing you can be bowing they can be bowing
Perfect
I can have bowed you can have bowed he can have bowed we can have bowed you can have bowed they can have bowed
V-ing perfect
I can have been bowing you can have been bowing he can have been bowing we can have been bowing you can have been bowing they can have been bowing
Negation
Simple form
I cannot bow you cannot bow he cannot bow we cannot bow you cannot bow they cannot bow
V-ing form
I cannot be bowing you cannot be bowing he cannot be bowing we cannot be bowing you cannot be bowing they cannot be bowing
Perfect
I cannot have bowed you cannot have bowed he cannot have bowed we cannot have bowed you cannot have bowed they cannot have bowed
V-ing perfect
I cannot have been bowing you cannot have been bowing he cannot have been bowing we cannot have been bowing you cannot have been bowing they cannot have been bowing
Interrogative form
Simple form
can I bow? can you bow? can he bow? can we bow? can you bow? can they bow?
V-ing form
can I be bowing? can you be bowing? can he be bowing? can we be bowing? can you be bowing? can they be bowing?
Perfect
can I have bowed? can you have bowed? can he have bowed? can we have bowed? can you have bowed? can they have bowed?
V-ing perfect
can I have been bowing? can you have been bowing? can he have been bowing? can we have been bowing? can you have been bowing? can they have been bowing?
Interro-negative form
Simple form
can I not bow? can you not bow? can he not bow? can we not bow? can you not bow? can they not bow?
V-ing form
can I not be bowing? can you not be bowing? can he not be bowing? can we not be bowing? can you not be bowing? can they not be bowing?
Perfect
can I not have bowed? can you not have bowed? can he not have bowed? can we not have bowed? can you not have bowed? can they not have bowed?
V-ing perfect
can I not have been bowing? can you not have been bowing? can he not have been bowing? can we not have been bowing? can you not have been bowing? can they not have been bowing?