could ask
Regular verb: ask - asked- asked

Affirmation 	
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I could ask
you could ask
he could ask
we could ask
you could ask
they could ask 	I could be asking
you could be asking
he could be asking
we could be asking
you could be asking
they could be asking	I could have asked
you could have asked
he could have asked
we could have asked
you could have asked
they could have asked	I could have been asking
you could have been asking
he could have been asking
we could have been asking
you could have been asking
they could have been asking	

Negation 	
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I couldn't ask
you couldn't ask
he couldn't ask
we couldn't ask
you couldn't ask
they couldn't ask 	I couldn't be asking
you couldn't be asking
he couldn't be asking
we couldn't be asking
you couldn't be asking
they couldn't be asking	I couldn't have asked
you couldn't have asked
he couldn't have asked
we couldn't have asked
you couldn't have asked
they couldn't have asked	I couldn't have been asking
you couldn't have been asking
he couldn't have been asking
we couldn't have been asking
you couldn't have been asking
they couldn't have been asking	

Interrogative form 	
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could I ask?
could you ask?
could he ask?
could we ask?
could you ask?
could they ask? 	could I be asking?
could you be asking?
could he be asking?
could we be asking?
could you be asking?
could they be asking? 	could I have asked?
could you have asked?
could he have asked?
could we have asked?
could you have asked?
could they have asked? 	could I have been asking?
could you have been asking?
could he have been asking?
could we have been asking?
could you have been asking?
could they have been asking? 	

Interro-negative form 	
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couldn't I ask?
couldn't you ask?
couldn't he ask?
couldn't we ask?
couldn't you ask?
couldn't they ask? 	couldn't I be asking?
couldn't you be asking?
couldn't he be asking?
couldn't we be asking?
couldn't you be asking?
couldn't they be asking? 	couldn't I have asked?
couldn't you have asked?
couldn't he have asked?
couldn't we have asked?
couldn't you have asked?
couldn't they have asked? 	couldn't I have been asking?
couldn't you have been asking?
couldn't he have been asking?
couldn't we have been asking?
couldn't you have been asking?
couldn't they have been asking?