could cripple
Regular verb: cripple - crippled- crippled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cripple
you could cripple
he could cripple
we could cripple
you could cripple
they could cripple 	I could be crippling
you could be crippling
he could be crippling
we could be crippling
you could be crippling
they could be crippling	I could have crippled
you could have crippled
he could have crippled
we could have crippled
you could have crippled
they could have crippled	I could have been crippling
you could have been crippling
he could have been crippling
we could have been crippling
you could have been crippling
they could have been crippling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not cripple
you could not cripple
he could not cripple
we could not cripple
you could not cripple
they could not cripple 	I could not be crippling
you could not be crippling
he could not be crippling
we could not be crippling
you could not be crippling
they could not be crippling	I could not have crippled
you could not have crippled
he could not have crippled
we could not have crippled
you could not have crippled
they could not have crippled	I could not have been crippling
you could not have been crippling
he could not have been crippling
we could not have been crippling
you could not have been crippling
they could not have been crippling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cripple?
could you cripple?
could he cripple?
could we cripple?
could you cripple?
could they cripple? 	could I be crippling?
could you be crippling?
could he be crippling?
could we be crippling?
could you be crippling?
could they be crippling? 	could I have crippled?
could you have crippled?
could he have crippled?
could we have crippled?
could you have crippled?
could they have crippled? 	could I have been crippling?
could you have been crippling?
could he have been crippling?
could we have been crippling?
could you have been crippling?
could they have been crippling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not cripple?
could you not cripple?
could he not cripple?
could we not cripple?
could you not cripple?
could they not cripple? 	could I not be crippling?
could you not be crippling?
could he not be crippling?
could we not be crippling?
could you not be crippling?
could they not be crippling? 	could I not have crippled?
could you not have crippled?
could he not have crippled?
could we not have crippled?
could you not have crippled?
could they not have crippled? 	could I not have been crippling?
could you not have been crippling?
could he not have been crippling?
could we not have been crippling?
could you not have been crippling?
could they not have been crippling?