could explain
Verbe régulier : explain - explained- explained
Traduction française : expliquer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could explain
you could explain
he could explain
we could explain
you could explain
they could explain 	I could be explaining
you could be explaining
he could be explaining
we could be explaining
you could be explaining
they could be explaining	I could have explained
you could have explained
he could have explained
we could have explained
you could have explained
they could have explained	I could have been explaining
you could have been explaining
he could have been explaining
we could have been explaining
you could have been explaining
they could have been explaining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not explain
you could not explain
he could not explain
we could not explain
you could not explain
they could not explain 	I could not be explaining
you could not be explaining
he could not be explaining
we could not be explaining
you could not be explaining
they could not be explaining	I could not have explained
you could not have explained
he could not have explained
we could not have explained
you could not have explained
they could not have explained	I could not have been explaining
you could not have been explaining
he could not have been explaining
we could not have been explaining
you could not have been explaining
they could not have been explaining	

Forme interrogative 	
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could I explain?
could you explain?
could he explain?
could we explain?
could you explain?
could they explain? 	could I be explaining?
could you be explaining?
could he be explaining?
could we be explaining?
could you be explaining?
could they be explaining? 	could I have explained?
could you have explained?
could he have explained?
could we have explained?
could you have explained?
could they have explained? 	could I have been explaining?
could you have been explaining?
could he have been explaining?
could we have been explaining?
could you have been explaining?
could they have been explaining? 	

Forme interro-négative 	
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could I not explain?
could you not explain?
could he not explain?
could we not explain?
could you not explain?
could they not explain? 	could I not be explaining?
could you not be explaining?
could he not be explaining?
could we not be explaining?
could you not be explaining?
could they not be explaining? 	could I not have explained?
could you not have explained?
could he not have explained?
could we not have explained?
could you not have explained?
could they not have explained? 	could I not have been explaining?
could you not have been explaining?
could he not have been explaining?
could we not have been explaining?
could you not have been explaining?
could they not have been explaining?