English verb conjugation
COULD GATECRASH

Regular verb: gatecrash - gatecrashed - gatecrashed

Affirmation

Simple form	V-ing form
I could gatecrash you could gatecrash he could gatecrash we could gatecrash you could gatecrash they could gatecrash	I could be gatecrashing you could be gatecrashing he could be gatecrashing we could be gatecrashing you could be gatecrashing they could be gatecrashing
Perfect	V-ing perfect
I could have gatecrashed you could have gatecrashed he could have gatecrashed we could have gatecrashed you could have gatecrashed they could have gatecrashed	I could have been gatecrashing you could have been gatecrashing he could have been gatecrashing we could have been gatecrashing you could have been gatecrashing they could have been gatecrashing

Negation

Simple form	V-ing form
I couldn't gatecrash you couldn't gatecrash he couldn't gatecrash we couldn't gatecrash you couldn't gatecrash they couldn't gatecrash	I couldn't be gatecrashing you couldn't be gatecrashing he couldn't be gatecrashing we couldn't be gatecrashing you couldn't be gatecrashing they couldn't be gatecrashing
Perfect	V-ing perfect
I couldn't have gatecrashed you couldn't have gatecrashed he couldn't have gatecrashed we couldn't have gatecrashed you couldn't have gatecrashed they couldn't have gatecrashed	I couldn't have been gatecrashing you couldn't have been gatecrashing he couldn't have been gatecrashing we couldn't have been gatecrashing you couldn't have been gatecrashing they couldn't have been gatecrashing

Interrogative form

Simple form	V-ing form
could I gatecrash? could you gatecrash? could he gatecrash? could we gatecrash? could you gatecrash? could they gatecrash?	could I be gatecrashing? could you be gatecrashing? could he be gatecrashing? could we be gatecrashing? could you be gatecrashing? could they be gatecrashing?
Perfect	V-ing perfect
could I have gatecrashed? could you have gatecrashed? could he have gatecrashed? could we have gatecrashed? could you have gatecrashed? could they have gatecrashed?	could I have been gatecrashing? could you have been gatecrashing? could he have been gatecrashing? could we have been gatecrashing? could you have been gatecrashing? could they have been gatecrashing?

Interro-negative form

Simple form	V-ing form
couldn't I gatecrash? couldn't you gatecrash? couldn't he gatecrash? couldn't we gatecrash? couldn't you gatecrash? couldn't they gatecrash?	couldn't I be gatecrashing? couldn't you be gatecrashing? couldn't he be gatecrashing? couldn't we be gatecrashing? couldn't you be gatecrashing? couldn't they be gatecrashing?
Perfect	V-ing perfect
couldn't I have gatecrashed? couldn't you have gatecrashed? couldn't he have gatecrashed? couldn't we have gatecrashed? couldn't you have gatecrashed? couldn't they have gatecrashed?	couldn't I have been gatecrashing? couldn't you have been gatecrashing? couldn't he have been gatecrashing? couldn't we have been gatecrashing? couldn't you have been gatecrashing? couldn't they have been gatecrashing?