could precess
Verbe régulier : precess - precessed- precessed

Affirmation 	
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I could precess
you could precess
he could precess
we could precess
you could precess
they could precess 	I could be precessing
you could be precessing
he could be precessing
we could be precessing
you could be precessing
they could be precessing	I could have precessed
you could have precessed
he could have precessed
we could have precessed
you could have precessed
they could have precessed	I could have been precessing
you could have been precessing
he could have been precessing
we could have been precessing
you could have been precessing
they could have been precessing	

Négation 	
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I couldn't precess
you couldn't precess
he couldn't precess
we couldn't precess
you couldn't precess
they couldn't precess 	I couldn't be precessing
you couldn't be precessing
he couldn't be precessing
we couldn't be precessing
you couldn't be precessing
they couldn't be precessing	I couldn't have precessed
you couldn't have precessed
he couldn't have precessed
we couldn't have precessed
you couldn't have precessed
they couldn't have precessed	I couldn't have been precessing
you couldn't have been precessing
he couldn't have been precessing
we couldn't have been precessing
you couldn't have been precessing
they couldn't have been precessing	

Forme interrogative 	
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could I precess?
could you precess?
could he precess?
could we precess?
could you precess?
could they precess? 	could I be precessing?
could you be precessing?
could he be precessing?
could we be precessing?
could you be precessing?
could they be precessing? 	could I have precessed?
could you have precessed?
could he have precessed?
could we have precessed?
could you have precessed?
could they have precessed? 	could I have been precessing?
could you have been precessing?
could he have been precessing?
could we have been precessing?
could you have been precessing?
could they have been precessing? 	

Forme interro-négative 	
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couldn't I precess?
couldn't you precess?
couldn't he precess?
couldn't we precess?
couldn't you precess?
couldn't they precess? 	couldn't I be precessing?
couldn't you be precessing?
couldn't he be precessing?
couldn't we be precessing?
couldn't you be precessing?
couldn't they be precessing? 	couldn't I have precessed?
couldn't you have precessed?
couldn't he have precessed?
couldn't we have precessed?
couldn't you have precessed?
couldn't they have precessed? 	couldn't I have been precessing?
couldn't you have been precessing?
couldn't he have been precessing?
couldn't we have been precessing?
couldn't you have been precessing?
couldn't they have been precessing?