I can gatecrash you can gatecrash she can gatecrash we can gatecrash you can gatecrash they can gatecrash
V-ing form
I can be gatecrashing you can be gatecrashing she can be gatecrashing we can be gatecrashing you can be gatecrashing they can be gatecrashing
Perfect
I can have gatecrashed you can have gatecrashed she can have gatecrashed we can have gatecrashed you can have gatecrashed they can have gatecrashed
V-ing perfect
I can have been gatecrashing you can have been gatecrashing she can have been gatecrashing we can have been gatecrashing you can have been gatecrashing they can have been gatecrashing
Negation
Simple form
I cannot gatecrash you cannot gatecrash she cannot gatecrash we cannot gatecrash you cannot gatecrash they cannot gatecrash
V-ing form
I cannot be gatecrashing you cannot be gatecrashing she cannot be gatecrashing we cannot be gatecrashing you cannot be gatecrashing they cannot be gatecrashing
Perfect
I cannot have gatecrashed you cannot have gatecrashed she cannot have gatecrashed we cannot have gatecrashed you cannot have gatecrashed they cannot have gatecrashed
V-ing perfect
I cannot have been gatecrashing you cannot have been gatecrashing she cannot have been gatecrashing we cannot have been gatecrashing you cannot have been gatecrashing they cannot have been gatecrashing
Interrogative form
Simple form
can I gatecrash? can you gatecrash? can she gatecrash? can we gatecrash? can you gatecrash? can they gatecrash?
V-ing form
can I be gatecrashing? can you be gatecrashing? can she be gatecrashing? can we be gatecrashing? can you be gatecrashing? can they be gatecrashing?
Perfect
can I have gatecrashed? can you have gatecrashed? can she have gatecrashed? can we have gatecrashed? can you have gatecrashed? can they have gatecrashed?
V-ing perfect
can I have been gatecrashing? can you have been gatecrashing? can she have been gatecrashing? can we have been gatecrashing? can you have been gatecrashing? can they have been gatecrashing?
Interro-negative form
Simple form
can I not gatecrash? can you not gatecrash? can she not gatecrash? can we not gatecrash? can you not gatecrash? can they not gatecrash?
V-ing form
can I not be gatecrashing? can you not be gatecrashing? can she not be gatecrashing? can we not be gatecrashing? can you not be gatecrashing? can they not be gatecrashing?
Perfect
can I not have gatecrashed? can you not have gatecrashed? can she not have gatecrashed? can we not have gatecrashed? can you not have gatecrashed? can they not have gatecrashed?
V-ing perfect
can I not have been gatecrashing? can you not have been gatecrashing? can she not have been gatecrashing? can we not have been gatecrashing? can you not have been gatecrashing? can they not have been gatecrashing?