could endue
Regular verb: endue - endued- endued

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could endue
you could endue
she could endue
we could endue
you could endue
they could endue 	I could be enduing
you could be enduing
she could be enduing
we could be enduing
you could be enduing
they could be enduing	I could have endued
you could have endued
she 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
she 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 couldn't endue
you couldn't endue
she couldn't endue
we couldn't endue
you couldn't endue
they couldn't endue 	I couldn't be enduing
you couldn't be enduing
she couldn't be enduing
we couldn't be enduing
you couldn't be enduing
they couldn't be enduing	I couldn't have endued
you couldn't have endued
she couldn't have endued
we couldn't have endued
you couldn't have endued
they couldn't have endued	I couldn't have been enduing
you couldn't have been enduing
she couldn't have been enduing
we couldn't have been enduing
you couldn't have been enduing
they couldn't have been enduing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I endue?
could you endue?
could she endue?
could we endue?
could you endue?
could they endue? 	could I be enduing?
could you be enduing?
could she be enduing?
could we be enduing?
could you be enduing?
could they be enduing? 	could I have endued?
could you have endued?
could she 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 she 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 	
couldn't I endue?
couldn't you endue?
couldn't she endue?
couldn't we endue?
couldn't you endue?
couldn't they endue? 	couldn't I be enduing?
couldn't you be enduing?
couldn't she be enduing?
couldn't we be enduing?
couldn't you be enduing?
couldn't they be enduing? 	couldn't I have endued?
couldn't you have endued?
couldn't she have endued?
couldn't we have endued?
couldn't you have endued?
couldn't they have endued? 	couldn't I have been enduing?
couldn't you have been enduing?
couldn't she have been enduing?
couldn't we have been enduing?
couldn't you have been enduing?
couldn't they have been enduing?