could tenter
Regular verb: tenter - tentered- tentered

Affirmation 	
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I could tenter
you could tenter
she could tenter
we could tenter
you could tenter
they could tenter 	I could be tentering
you could be tentering
she could be tentering
we could be tentering
you could be tentering
they could be tentering	I could have tentered
you could have tentered
she could have tentered
we could have tentered
you could have tentered
they could have tentered	I could have been tentering
you could have been tentering
she could have been tentering
we could have been tentering
you could have been tentering
they could have been tentering	

Negation 	
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I couldn't tenter
you couldn't tenter
she couldn't tenter
we couldn't tenter
you couldn't tenter
they couldn't tenter 	I couldn't be tentering
you couldn't be tentering
she couldn't be tentering
we couldn't be tentering
you couldn't be tentering
they couldn't be tentering	I couldn't have tentered
you couldn't have tentered
she couldn't have tentered
we couldn't have tentered
you couldn't have tentered
they couldn't have tentered	I couldn't have been tentering
you couldn't have been tentering
she couldn't have been tentering
we couldn't have been tentering
you couldn't have been tentering
they couldn't have been tentering	

Interrogative form 	
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could I tenter?
could you tenter?
could she tenter?
could we tenter?
could you tenter?
could they tenter? 	could I be tentering?
could you be tentering?
could she be tentering?
could we be tentering?
could you be tentering?
could they be tentering? 	could I have tentered?
could you have tentered?
could she have tentered?
could we have tentered?
could you have tentered?
could they have tentered? 	could I have been tentering?
could you have been tentering?
could she have been tentering?
could we have been tentering?
could you have been tentering?
could they have been tentering? 	

Interro-negative form 	
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couldn't I tenter?
couldn't you tenter?
couldn't she tenter?
couldn't we tenter?
couldn't you tenter?
couldn't they tenter? 	couldn't I be tentering?
couldn't you be tentering?
couldn't she be tentering?
couldn't we be tentering?
couldn't you be tentering?
couldn't they be tentering? 	couldn't I have tentered?
couldn't you have tentered?
couldn't she have tentered?
couldn't we have tentered?
couldn't you have tentered?
couldn't they have tentered? 	couldn't I have been tentering?
couldn't you have been tentering?
couldn't she have been tentering?
couldn't we have been tentering?
couldn't you have been tentering?
couldn't they have been tentering?