could entail
Regular verb: entail - entailed- entailed

Affirmation 	
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I could entail
you could entail
she could entail
we could entail
you could entail
they could entail 	I could be entailing
you could be entailing
she could be entailing
we could be entailing
you could be entailing
they could be entailing	I could have entailed
you could have entailed
she could have entailed
we could have entailed
you could have entailed
they could have entailed	I could have been entailing
you could have been entailing
she could have been entailing
we could have been entailing
you could have been entailing
they could have been entailing	

Negation 	
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I couldn't entail
you couldn't entail
she couldn't entail
we couldn't entail
you couldn't entail
they couldn't entail 	I couldn't be entailing
you couldn't be entailing
she couldn't be entailing
we couldn't be entailing
you couldn't be entailing
they couldn't be entailing	I couldn't have entailed
you couldn't have entailed
she couldn't have entailed
we couldn't have entailed
you couldn't have entailed
they couldn't have entailed	I couldn't have been entailing
you couldn't have been entailing
she couldn't have been entailing
we couldn't have been entailing
you couldn't have been entailing
they couldn't have been entailing	

Interrogative form 	
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could I entail?
could you entail?
could she entail?
could we entail?
could you entail?
could they entail? 	could I be entailing?
could you be entailing?
could she be entailing?
could we be entailing?
could you be entailing?
could they be entailing? 	could I have entailed?
could you have entailed?
could she have entailed?
could we have entailed?
could you have entailed?
could they have entailed? 	could I have been entailing?
could you have been entailing?
could she have been entailing?
could we have been entailing?
could you have been entailing?
could they have been entailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I entail?
couldn't you entail?
couldn't she entail?
couldn't we entail?
couldn't you entail?
couldn't they entail? 	couldn't I be entailing?
couldn't you be entailing?
couldn't she be entailing?
couldn't we be entailing?
couldn't you be entailing?
couldn't they be entailing? 	couldn't I have entailed?
couldn't you have entailed?
couldn't she have entailed?
couldn't we have entailed?
couldn't you have entailed?
couldn't they have entailed? 	couldn't I have been entailing?
couldn't you have been entailing?
couldn't she have been entailing?
couldn't we have been entailing?
couldn't you have been entailing?
couldn't they have been entailing?