I can puke you can puke she can puke we can puke you can puke they can puke
V-ing form
I can be puking you can be puking she can be puking we can be puking you can be puking they can be puking
Perfect
I can have puked you can have puked she 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 she 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 she cannot puke we cannot puke you cannot puke they cannot puke
V-ing form
I cannot be puking you cannot be puking she cannot be puking we cannot be puking you cannot be puking they cannot be puking
Perfect
I cannot have puked you cannot have puked she 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 she 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 she puke? can we puke? can you puke? can they puke?
V-ing form
can I be puking? can you be puking? can she be puking? can we be puking? can you be puking? can they be puking?
Perfect
can I have puked? can you have puked? can she 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 she 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 she 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 she 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 she 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 she not have been puking? can we not have been puking? can you not have been puking? can they not have been puking?