I can beep you can beep he can beep we can beep you can beep they can beep
V-ing form
I can be beeping you can be beeping he can be beeping we can be beeping you can be beeping they can be beeping
Perfect
I can have beeped you can have beeped he can have beeped we can have beeped you can have beeped they can have beeped
V-ing perfect
I can have been beeping you can have been beeping he can have been beeping we can have been beeping you can have been beeping they can have been beeping
Negation
Simple form
I cannot beep you cannot beep he cannot beep we cannot beep you cannot beep they cannot beep
V-ing form
I cannot be beeping you cannot be beeping he cannot be beeping we cannot be beeping you cannot be beeping they cannot be beeping
Perfect
I cannot have beeped you cannot have beeped he cannot have beeped we cannot have beeped you cannot have beeped they cannot have beeped
V-ing perfect
I cannot have been beeping you cannot have been beeping he cannot have been beeping we cannot have been beeping you cannot have been beeping they cannot have been beeping
Interrogative form
Simple form
can I beep? can you beep? can he beep? can we beep? can you beep? can they beep?
V-ing form
can I be beeping? can you be beeping? can he be beeping? can we be beeping? can you be beeping? can they be beeping?
Perfect
can I have beeped? can you have beeped? can he have beeped? can we have beeped? can you have beeped? can they have beeped?
V-ing perfect
can I have been beeping? can you have been beeping? can he have been beeping? can we have been beeping? can you have been beeping? can they have been beeping?
Interro-negative form
Simple form
can I not beep? can you not beep? can he not beep? can we not beep? can you not beep? can they not beep?
V-ing form
can I not be beeping? can you not be beeping? can he not be beeping? can we not be beeping? can you not be beeping? can they not be beeping?
Perfect
can I not have beeped? can you not have beeped? can he not have beeped? can we not have beeped? can you not have beeped? can they not have beeped?
V-ing perfect
can I not have been beeping? can you not have been beeping? can he not have been beeping? can we not have been beeping? can you not have been beeping? can they not have been beeping?