could mask
Verbe régulier : mask - masked- masked
Traduction française : masquer - cacher 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could mask
you could mask
she could mask
we could mask
you could mask
they could mask 	I could be masking
you could be masking
she could be masking
we could be masking
you could be masking
they could be masking	I could have masked
you could have masked
she could have masked
we could have masked
you could have masked
they could have masked	I could have been masking
you could have been masking
she could have been masking
we could have been masking
you could have been masking
they could have been masking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't mask
you couldn't mask
she couldn't mask
we couldn't mask
you couldn't mask
they couldn't mask 	I couldn't be masking
you couldn't be masking
she couldn't be masking
we couldn't be masking
you couldn't be masking
they couldn't be masking	I couldn't have masked
you couldn't have masked
she couldn't have masked
we couldn't have masked
you couldn't have masked
they couldn't have masked	I couldn't have been masking
you couldn't have been masking
she couldn't have been masking
we couldn't have been masking
you couldn't have been masking
they couldn't have been masking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I mask?
could you mask?
could she mask?
could we mask?
could you mask?
could they mask? 	could I be masking?
could you be masking?
could she be masking?
could we be masking?
could you be masking?
could they be masking? 	could I have masked?
could you have masked?
could she have masked?
could we have masked?
could you have masked?
could they have masked? 	could I have been masking?
could you have been masking?
could she have been masking?
could we have been masking?
could you have been masking?
could they have been masking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I mask?
couldn't you mask?
couldn't she mask?
couldn't we mask?
couldn't you mask?
couldn't they mask? 	couldn't I be masking?
couldn't you be masking?
couldn't she be masking?
couldn't we be masking?
couldn't you be masking?
couldn't they be masking? 	couldn't I have masked?
couldn't you have masked?
couldn't she have masked?
couldn't we have masked?
couldn't you have masked?
couldn't they have masked? 	couldn't I have been masking?
couldn't you have been masking?
couldn't she have been masking?
couldn't we have been masking?
couldn't you have been masking?
couldn't they have been masking?