could dehisce
Regular verb: dehisce - dehisced- dehisced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could dehisce
you could dehisce
he could dehisce
we could dehisce
you could dehisce
they could dehisce 	I could be dehiscing
you could be dehiscing
he could be dehiscing
we could be dehiscing
you could be dehiscing
they could be dehiscing	I could have dehisced
you could have dehisced
he could have dehisced
we could have dehisced
you could have dehisced
they could have dehisced	I could have been dehiscing
you could have been dehiscing
he could have been dehiscing
we could have been dehiscing
you could have been dehiscing
they could have been dehiscing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not dehisce
you could not dehisce
he could not dehisce
we could not dehisce
you could not dehisce
they could not dehisce 	I could not be dehiscing
you could not be dehiscing
he could not be dehiscing
we could not be dehiscing
you could not be dehiscing
they could not be dehiscing	I could not have dehisced
you could not have dehisced
he could not have dehisced
we could not have dehisced
you could not have dehisced
they could not have dehisced	I could not have been dehiscing
you could not have been dehiscing
he could not have been dehiscing
we could not have been dehiscing
you could not have been dehiscing
they could not have been dehiscing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I dehisce?
could you dehisce?
could he dehisce?
could we dehisce?
could you dehisce?
could they dehisce? 	could I be dehiscing?
could you be dehiscing?
could he be dehiscing?
could we be dehiscing?
could you be dehiscing?
could they be dehiscing? 	could I have dehisced?
could you have dehisced?
could he have dehisced?
could we have dehisced?
could you have dehisced?
could they have dehisced? 	could I have been dehiscing?
could you have been dehiscing?
could he have been dehiscing?
could we have been dehiscing?
could you have been dehiscing?
could they have been dehiscing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not dehisce?
could you not dehisce?
could he not dehisce?
could we not dehisce?
could you not dehisce?
could they not dehisce? 	could I not be dehiscing?
could you not be dehiscing?
could he not be dehiscing?
could we not be dehiscing?
could you not be dehiscing?
could they not be dehiscing? 	could I not have dehisced?
could you not have dehisced?
could he not have dehisced?
could we not have dehisced?
could you not have dehisced?
could they not have dehisced? 	could I not have been dehiscing?
could you not have been dehiscing?
could he not have been dehiscing?
could we not have been dehiscing?
could you not have been dehiscing?
could they not have been dehiscing?