I can puke you can puke he can puke we can puke you can puke they can puke
V-ing form
I can be puking you can be puking he can be puking we can be puking you can be puking they can be puking
Perfect
I can have puked you can have puked he can have puked we can have puked you can have puked they can have puked
V-ing perfect
I can have been puking you can have been puking he can have been puking we can have been puking you can have been puking they can have been puking
Negation
Simple form
I cannot puke you cannot puke he cannot puke we cannot puke you cannot puke they cannot puke
V-ing form
I cannot be puking you cannot be puking he cannot be puking we cannot be puking you cannot be puking they cannot be puking
Perfect
I cannot have puked you cannot have puked he cannot have puked we cannot have puked you cannot have puked they cannot have puked
V-ing perfect
I cannot have been puking you cannot have been puking he cannot have been puking we cannot have been puking you cannot have been puking they cannot have been puking
Interrogative form
Simple form
can I puke? can you puke? can he puke? can we puke? can you puke? can they puke?
V-ing form
can I be puking? can you be puking? can he be puking? can we be puking? can you be puking? can they be puking?
Perfect
can I have puked? can you have puked? can he have puked? can we have puked? can you have puked? can they have puked?
V-ing perfect
can I have been puking? can you have been puking? can he have been puking? can we have been puking? can you have been puking? can they have been puking?
Interro-negative form
Simple form
can I not puke? can you not puke? can he not puke? can we not puke? can you not puke? can they not puke?
V-ing form
can I not be puking? can you not be puking? can he not be puking? can we not be puking? can you not be puking? can they not be puking?
Perfect
can I not have puked? can you not have puked? can he not have puked? can we not have puked? can you not have puked? can they not have puked?
V-ing perfect
can I not have been puking? can you not have been puking? can he not have been puking? can we not have been puking? can you not have been puking? can they not have been puking?