could club
Regular verb: club - clubbed- clubbed

Affirmation 	
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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	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 	
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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	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 	
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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? 	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 	
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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? 	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?