could sough
Regular verb: sough - soughed- soughed

Affirmation 	
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I could sough
you could sough
he could sough
we could sough
you could sough
they could sough 	I could be soughing
you could be soughing
he could be soughing
we could be soughing
you could be soughing
they could be soughing	I could have soughed
you could have soughed
he could have soughed
we could have soughed
you could have soughed
they could have soughed	I could have been soughing
you could have been soughing
he could have been soughing
we could have been soughing
you could have been soughing
they could have been soughing	

Negation 	
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I couldn't sough
you couldn't sough
he couldn't sough
we couldn't sough
you couldn't sough
they couldn't sough 	I couldn't be soughing
you couldn't be soughing
he couldn't be soughing
we couldn't be soughing
you couldn't be soughing
they couldn't be soughing	I couldn't have soughed
you couldn't have soughed
he couldn't have soughed
we couldn't have soughed
you couldn't have soughed
they couldn't have soughed	I couldn't have been soughing
you couldn't have been soughing
he couldn't have been soughing
we couldn't have been soughing
you couldn't have been soughing
they couldn't have been soughing	

Interrogative form 	
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could I sough?
could you sough?
could he sough?
could we sough?
could you sough?
could they sough? 	could I be soughing?
could you be soughing?
could he be soughing?
could we be soughing?
could you be soughing?
could they be soughing? 	could I have soughed?
could you have soughed?
could he have soughed?
could we have soughed?
could you have soughed?
could they have soughed? 	could I have been soughing?
could you have been soughing?
could he have been soughing?
could we have been soughing?
could you have been soughing?
could they have been soughing? 	

Interro-negative form 	
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couldn't I sough?
couldn't you sough?
couldn't he sough?
couldn't we sough?
couldn't you sough?
couldn't they sough? 	couldn't I be soughing?
couldn't you be soughing?
couldn't he be soughing?
couldn't we be soughing?
couldn't you be soughing?
couldn't they be soughing? 	couldn't I have soughed?
couldn't you have soughed?
couldn't he have soughed?
couldn't we have soughed?
couldn't you have soughed?
couldn't they have soughed? 	couldn't I have been soughing?
couldn't you have been soughing?
couldn't he have been soughing?
couldn't we have been soughing?
couldn't you have been soughing?
couldn't they have been soughing?