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 couldn't club you couldn't club he couldn't club we couldn't club you couldn't club they couldn't club	I couldn't be clubbing you couldn't be clubbing he couldn't be clubbing we couldn't be clubbing you couldn't be clubbing they couldn't be clubbing
Perfect	V-ing perfect
I couldn't have clubbed you couldn't have clubbed he couldn't have clubbed we couldn't have clubbed you couldn't have clubbed they couldn't have clubbed	I couldn't have been clubbing you couldn't have been clubbing he couldn't have been clubbing we couldn't have been clubbing you couldn't have been clubbing they couldn't 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
couldn't I club? couldn't you club? couldn't he club? couldn't we club? couldn't you club? couldn't they club?	couldn't I be clubbing? couldn't you be clubbing? couldn't he be clubbing? couldn't we be clubbing? couldn't you be clubbing? couldn't they be clubbing?
Perfect	V-ing perfect
couldn't I have clubbed? couldn't you have clubbed? couldn't he have clubbed? couldn't we have clubbed? couldn't you have clubbed? couldn't they have clubbed?	couldn't I have been clubbing? couldn't you have been clubbing? couldn't he have been clubbing? couldn't we have been clubbing? couldn't you have been clubbing? couldn't they have been clubbing?