could pick
Regular verb: pick - picked- picked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could pick
you could pick
he could pick
we could pick
you could pick
they could pick 	I could be picking
you could be picking
he could be picking
we could be picking
you could be picking
they could be picking	I could have picked
you could have picked
he could have picked
we could have picked
you could have picked
they could have picked	I could have been picking
you could have been picking
he could have been picking
we could have been picking
you could have been picking
they could have been picking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not pick
you could not pick
he could not pick
we could not pick
you could not pick
they could not pick 	I could not be picking
you could not be picking
he could not be picking
we could not be picking
you could not be picking
they could not be picking	I could not have picked
you could not have picked
he could not have picked
we could not have picked
you could not have picked
they could not have picked	I could not have been picking
you could not have been picking
he could not have been picking
we could not have been picking
you could not have been picking
they could not have been picking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I pick?
could you pick?
could he pick?
could we pick?
could you pick?
could they pick? 	could I be picking?
could you be picking?
could he be picking?
could we be picking?
could you be picking?
could they be picking? 	could I have picked?
could you have picked?
could he have picked?
could we have picked?
could you have picked?
could they have picked? 	could I have been picking?
could you have been picking?
could he have been picking?
could we have been picking?
could you have been picking?
could they have been picking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not pick?
could you not pick?
could he not pick?
could we not pick?
could you not pick?
could they not pick? 	could I not be picking?
could you not be picking?
could he not be picking?
could we not be picking?
could you not be picking?
could they not be picking? 	could I not have picked?
could you not have picked?
could he not have picked?
could we not have picked?
could you not have picked?
could they not have picked? 	could I not have been picking?
could you not have been picking?
could he not have been picking?
could we not have been picking?
could you not have been picking?
could they not have been picking?