could speak
Irregular verb: speak - spoke- spoken, spoke

Affirmation 	
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I could speak
you could speak
he could speak
we could speak
you could speak
they could speak 	I could be speaking
you could be speaking
he could be speaking
we could be speaking
you could be speaking
they could be speaking	I could have spoken, spoke
you could have spoken, spoke
he could have spoken, spoke
we could have spoken, spoke
you could have spoken, spoke
they could have spoken, spoke	I could have been speaking
you could have been speaking
he could have been speaking
we could have been speaking
you could have been speaking
they could have been speaking	

Negation 	
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I couldn't speak
you couldn't speak
he couldn't speak
we couldn't speak
you couldn't speak
they couldn't speak 	I couldn't be speaking
you couldn't be speaking
he couldn't be speaking
we couldn't be speaking
you couldn't be speaking
they couldn't be speaking	I couldn't have spoken, spoke
you couldn't have spoken, spoke
he couldn't have spoken, spoke
we couldn't have spoken, spoke
you couldn't have spoken, spoke
they couldn't have spoken, spoke	I couldn't have been speaking
you couldn't have been speaking
he couldn't have been speaking
we couldn't have been speaking
you couldn't have been speaking
they couldn't have been speaking	

Interrogative form 	
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could I speak?
could you speak?
could he speak?
could we speak?
could you speak?
could they speak? 	could I be speaking?
could you be speaking?
could he be speaking?
could we be speaking?
could you be speaking?
could they be speaking? 	could I have spoken, spoke?
could you have spoken, spoke?
could he have spoken, spoke?
could we have spoken, spoke?
could you have spoken, spoke?
could they have spoken, spoke? 	could I have been speaking?
could you have been speaking?
could he have been speaking?
could we have been speaking?
could you have been speaking?
could they have been speaking? 	

Interro-negative form 	
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couldn't I speak?
couldn't you speak?
couldn't he speak?
couldn't we speak?
couldn't you speak?
couldn't they speak? 	couldn't I be speaking?
couldn't you be speaking?
couldn't he be speaking?
couldn't we be speaking?
couldn't you be speaking?
couldn't they be speaking? 	couldn't I have spoken, spoke?
couldn't you have spoken, spoke?
couldn't he have spoken, spoke?
couldn't we have spoken, spoke?
couldn't you have spoken, spoke?
couldn't they have spoken, spoke? 	couldn't I have been speaking?
couldn't you have been speaking?
couldn't he have been speaking?
couldn't we have been speaking?
couldn't you have been speaking?
couldn't they have been speaking?