could syrup
Regular verb: syrup - syruped- syruped

Affirmation 	
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I could syrup
you could syrup
he could syrup
we could syrup
you could syrup
they could syrup 	I could be syruping
you could be syruping
he could be syruping
we could be syruping
you could be syruping
they could be syruping	I could have syruped
you could have syruped
he could have syruped
we could have syruped
you could have syruped
they could have syruped	I could have been syruping
you could have been syruping
he could have been syruping
we could have been syruping
you could have been syruping
they could have been syruping	

Negation 	
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I couldn't syrup
you couldn't syrup
he couldn't syrup
we couldn't syrup
you couldn't syrup
they couldn't syrup 	I couldn't be syruping
you couldn't be syruping
he couldn't be syruping
we couldn't be syruping
you couldn't be syruping
they couldn't be syruping	I couldn't have syruped
you couldn't have syruped
he couldn't have syruped
we couldn't have syruped
you couldn't have syruped
they couldn't have syruped	I couldn't have been syruping
you couldn't have been syruping
he couldn't have been syruping
we couldn't have been syruping
you couldn't have been syruping
they couldn't have been syruping	

Interrogative form 	
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could I syrup?
could you syrup?
could he syrup?
could we syrup?
could you syrup?
could they syrup? 	could I be syruping?
could you be syruping?
could he be syruping?
could we be syruping?
could you be syruping?
could they be syruping? 	could I have syruped?
could you have syruped?
could he have syruped?
could we have syruped?
could you have syruped?
could they have syruped? 	could I have been syruping?
could you have been syruping?
could he have been syruping?
could we have been syruping?
could you have been syruping?
could they have been syruping? 	

Interro-negative form 	
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couldn't I syrup?
couldn't you syrup?
couldn't he syrup?
couldn't we syrup?
couldn't you syrup?
couldn't they syrup? 	couldn't I be syruping?
couldn't you be syruping?
couldn't he be syruping?
couldn't we be syruping?
couldn't you be syruping?
couldn't they be syruping? 	couldn't I have syruped?
couldn't you have syruped?
couldn't he have syruped?
couldn't we have syruped?
couldn't you have syruped?
couldn't they have syruped? 	couldn't I have been syruping?
couldn't you have been syruping?
couldn't he have been syruping?
couldn't we have been syruping?
couldn't you have been syruping?
couldn't they have been syruping?