could grip
Regular verb: grip - gripped- gripped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could grip
you could grip
he could grip
we could grip
you could grip
they could grip 	I could be gripping
you could be gripping
he could be gripping
we could be gripping
you could be gripping
they could be gripping	I could have gripped
you could have gripped
he could have gripped
we could have gripped
you could have gripped
they could have gripped	I could have been gripping
you could have been gripping
he could have been gripping
we could have been gripping
you could have been gripping
they could have been gripping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not grip
you could not grip
he could not grip
we could not grip
you could not grip
they could not grip 	I could not be gripping
you could not be gripping
he could not be gripping
we could not be gripping
you could not be gripping
they could not be gripping	I could not have gripped
you could not have gripped
he could not have gripped
we could not have gripped
you could not have gripped
they could not have gripped	I could not have been gripping
you could not have been gripping
he could not have been gripping
we could not have been gripping
you could not have been gripping
they could not have been gripping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I grip?
could you grip?
could he grip?
could we grip?
could you grip?
could they grip? 	could I be gripping?
could you be gripping?
could he be gripping?
could we be gripping?
could you be gripping?
could they be gripping? 	could I have gripped?
could you have gripped?
could he have gripped?
could we have gripped?
could you have gripped?
could they have gripped? 	could I have been gripping?
could you have been gripping?
could he have been gripping?
could we have been gripping?
could you have been gripping?
could they have been gripping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not grip?
could you not grip?
could he not grip?
could we not grip?
could you not grip?
could they not grip? 	could I not be gripping?
could you not be gripping?
could he not be gripping?
could we not be gripping?
could you not be gripping?
could they not be gripping? 	could I not have gripped?
could you not have gripped?
could he not have gripped?
could we not have gripped?
could you not have gripped?
could they not have gripped? 	could I not have been gripping?
could you not have been gripping?
could he not have been gripping?
could we not have been gripping?
could you not have been gripping?
could they not have been gripping?