could endue
Regular verb: endue - endued- endued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could endue
you could endue
he could endue
we could endue
you could endue
they could endue 	I could be enduing
you could be enduing
he could be enduing
we could be enduing
you could be enduing
they could be enduing	I could have endued
you could have endued
he could have endued
we could have endued
you could have endued
they could have endued	I could have been enduing
you could have been enduing
he could have been enduing
we could have been enduing
you could have been enduing
they could have been enduing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not endue
you could not endue
he could not endue
we could not endue
you could not endue
they could not endue 	I could not be enduing
you could not be enduing
he could not be enduing
we could not be enduing
you could not be enduing
they could not be enduing	I could not have endued
you could not have endued
he could not have endued
we could not have endued
you could not have endued
they could not have endued	I could not have been enduing
you could not have been enduing
he could not have been enduing
we could not have been enduing
you could not have been enduing
they could not have been enduing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I endue?
could you endue?
could he endue?
could we endue?
could you endue?
could they endue? 	could I be enduing?
could you be enduing?
could he be enduing?
could we be enduing?
could you be enduing?
could they be enduing? 	could I have endued?
could you have endued?
could he have endued?
could we have endued?
could you have endued?
could they have endued? 	could I have been enduing?
could you have been enduing?
could he have been enduing?
could we have been enduing?
could you have been enduing?
could they have been enduing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not endue?
could you not endue?
could he not endue?
could we not endue?
could you not endue?
could they not endue? 	could I not be enduing?
could you not be enduing?
could he not be enduing?
could we not be enduing?
could you not be enduing?
could they not be enduing? 	could I not have endued?
could you not have endued?
could he not have endued?
could we not have endued?
could you not have endued?
could they not have endued? 	could I not have been enduing?
could you not have been enduing?
could he not have been enduing?
could we not have been enduing?
could you not have been enduing?
could they not have been enduing?