could sneer
Regular verb: sneer - sneered- sneered

Affirmation 	
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I could sneer
you could sneer
she could sneer
we could sneer
you could sneer
they could sneer 	I could be sneering
you could be sneering
she could be sneering
we could be sneering
you could be sneering
they could be sneering	I could have sneered
you could have sneered
she could have sneered
we could have sneered
you could have sneered
they could have sneered	I could have been sneering
you could have been sneering
she could have been sneering
we could have been sneering
you could have been sneering
they could have been sneering	

Negation 	
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I couldn't sneer
you couldn't sneer
she couldn't sneer
we couldn't sneer
you couldn't sneer
they couldn't sneer 	I couldn't be sneering
you couldn't be sneering
she couldn't be sneering
we couldn't be sneering
you couldn't be sneering
they couldn't be sneering	I couldn't have sneered
you couldn't have sneered
she couldn't have sneered
we couldn't have sneered
you couldn't have sneered
they couldn't have sneered	I couldn't have been sneering
you couldn't have been sneering
she couldn't have been sneering
we couldn't have been sneering
you couldn't have been sneering
they couldn't have been sneering	

Interrogative form 	
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could I sneer?
could you sneer?
could she sneer?
could we sneer?
could you sneer?
could they sneer? 	could I be sneering?
could you be sneering?
could she be sneering?
could we be sneering?
could you be sneering?
could they be sneering? 	could I have sneered?
could you have sneered?
could she have sneered?
could we have sneered?
could you have sneered?
could they have sneered? 	could I have been sneering?
could you have been sneering?
could she have been sneering?
could we have been sneering?
could you have been sneering?
could they have been sneering? 	

Interro-negative form 	
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couldn't I sneer?
couldn't you sneer?
couldn't she sneer?
couldn't we sneer?
couldn't you sneer?
couldn't they sneer? 	couldn't I be sneering?
couldn't you be sneering?
couldn't she be sneering?
couldn't we be sneering?
couldn't you be sneering?
couldn't they be sneering? 	couldn't I have sneered?
couldn't you have sneered?
couldn't she have sneered?
couldn't we have sneered?
couldn't you have sneered?
couldn't they have sneered? 	couldn't I have been sneering?
couldn't you have been sneering?
couldn't she have been sneering?
couldn't we have been sneering?
couldn't you have been sneering?
couldn't they have been sneering?