could specialize
Verbe régulier : specialize - specialized- specialized
Traduction française : se spécialiser 

Affirmation 	
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I could specialize
you could specialize
he could specialize
we could specialize
you could specialize
they could specialize 	I could be specializing
you could be specializing
he could be specializing
we could be specializing
you could be specializing
they could be specializing	I could have specialized
you could have specialized
he could have specialized
we could have specialized
you could have specialized
they could have specialized	I could have been specializing
you could have been specializing
he could have been specializing
we could have been specializing
you could have been specializing
they could have been specializing	

Négation 	
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I couldn't specialize
you couldn't specialize
he couldn't specialize
we couldn't specialize
you couldn't specialize
they couldn't specialize 	I couldn't be specializing
you couldn't be specializing
he couldn't be specializing
we couldn't be specializing
you couldn't be specializing
they couldn't be specializing	I couldn't have specialized
you couldn't have specialized
he couldn't have specialized
we couldn't have specialized
you couldn't have specialized
they couldn't have specialized	I couldn't have been specializing
you couldn't have been specializing
he couldn't have been specializing
we couldn't have been specializing
you couldn't have been specializing
they couldn't have been specializing	

Forme interrogative 	
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could I specialize?
could you specialize?
could he specialize?
could we specialize?
could you specialize?
could they specialize? 	could I be specializing?
could you be specializing?
could he be specializing?
could we be specializing?
could you be specializing?
could they be specializing? 	could I have specialized?
could you have specialized?
could he have specialized?
could we have specialized?
could you have specialized?
could they have specialized? 	could I have been specializing?
could you have been specializing?
could he have been specializing?
could we have been specializing?
could you have been specializing?
could they have been specializing? 	

Forme interro-négative 	
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couldn't I specialize?
couldn't you specialize?
couldn't he specialize?
couldn't we specialize?
couldn't you specialize?
couldn't they specialize? 	couldn't I be specializing?
couldn't you be specializing?
couldn't he be specializing?
couldn't we be specializing?
couldn't you be specializing?
couldn't they be specializing? 	couldn't I have specialized?
couldn't you have specialized?
couldn't he have specialized?
couldn't we have specialized?
couldn't you have specialized?
couldn't they have specialized? 	couldn't I have been specializing?
couldn't you have been specializing?
couldn't he have been specializing?
couldn't we have been specializing?
couldn't you have been specializing?
couldn't they have been specializing?