English verb conjugation
COULD CLUB

Regular verb: club - clubbed - clubbed

Affirmation

Simple form	V-ing form
I could club you could club he could club we could club you could club they could club	I could be clubbing you could be clubbing he could be clubbing we could be clubbing you could be clubbing they could be clubbing
Perfect	V-ing perfect
I could have clubbed you could have clubbed he could have clubbed we could have clubbed you could have clubbed they could have clubbed	I could have been clubbing you could have been clubbing he could have been clubbing we could have been clubbing you could have been clubbing they could have been clubbing

Negation

Simple form	V-ing form
I could not club you could not club he could not club we could not club you could not club they could not club	I could not be clubbing you could not be clubbing he could not be clubbing we could not be clubbing you could not be clubbing they could not be clubbing
Perfect	V-ing perfect
I could not have clubbed you could not have clubbed he could not have clubbed we could not have clubbed you could not have clubbed they could not have clubbed	I could not have been clubbing you could not have been clubbing he could not have been clubbing we could not have been clubbing you could not have been clubbing they could not have been clubbing

Interrogative form

Simple form	V-ing form
could I club? could you club? could he club? could we club? could you club? could they club?	could I be clubbing? could you be clubbing? could he be clubbing? could we be clubbing? could you be clubbing? could they be clubbing?
Perfect	V-ing perfect
could I have clubbed? could you have clubbed? could he have clubbed? could we have clubbed? could you have clubbed? could they have clubbed?	could I have been clubbing? could you have been clubbing? could he have been clubbing? could we have been clubbing? could you have been clubbing? could they have been clubbing?

Interro-negative form

Simple form	V-ing form
could I not club? could you not club? could he not club? could we not club? could you not club? could they not club?	could I not be clubbing? could you not be clubbing? could he not be clubbing? could we not be clubbing? could you not be clubbing? could they not be clubbing?
Perfect	V-ing perfect
could I not have clubbed? could you not have clubbed? could he not have clubbed? could we not have clubbed? could you not have clubbed? could they not have clubbed?	could I not have been clubbing? could you not have been clubbing? could he not have been clubbing? could we not have been clubbing? could you not have been clubbing? could they not have been clubbing?