could strangle
Regular verb: strangle - strangled- strangled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could strangle
you could strangle
he could strangle
we could strangle
you could strangle
they could strangle 	I could be strangling
you could be strangling
he could be strangling
we could be strangling
you could be strangling
they could be strangling	I could have strangled
you could have strangled
he could have strangled
we could have strangled
you could have strangled
they could have strangled	I could have been strangling
you could have been strangling
he could have been strangling
we could have been strangling
you could have been strangling
they could have been strangling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not strangle
you could not strangle
he could not strangle
we could not strangle
you could not strangle
they could not strangle 	I could not be strangling
you could not be strangling
he could not be strangling
we could not be strangling
you could not be strangling
they could not be strangling	I could not have strangled
you could not have strangled
he could not have strangled
we could not have strangled
you could not have strangled
they could not have strangled	I could not have been strangling
you could not have been strangling
he could not have been strangling
we could not have been strangling
you could not have been strangling
they could not have been strangling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I strangle?
could you strangle?
could he strangle?
could we strangle?
could you strangle?
could they strangle? 	could I be strangling?
could you be strangling?
could he be strangling?
could we be strangling?
could you be strangling?
could they be strangling? 	could I have strangled?
could you have strangled?
could he have strangled?
could we have strangled?
could you have strangled?
could they have strangled? 	could I have been strangling?
could you have been strangling?
could he have been strangling?
could we have been strangling?
could you have been strangling?
could they have been strangling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not strangle?
could you not strangle?
could he not strangle?
could we not strangle?
could you not strangle?
could they not strangle? 	could I not be strangling?
could you not be strangling?
could he not be strangling?
could we not be strangling?
could you not be strangling?
could they not be strangling? 	could I not have strangled?
could you not have strangled?
could he not have strangled?
could we not have strangled?
could you not have strangled?
could they not have strangled? 	could I not have been strangling?
could you not have been strangling?
could he not have been strangling?
could we not have been strangling?
could you not have been strangling?
could they not have been strangling?