could hydrogenate
Verbe régulier : hydrogenate - hydrogenated- hydrogenated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could hydrogenate
you could hydrogenate
she could hydrogenate
we could hydrogenate
you could hydrogenate
they could hydrogenate 	I could be hydrogenating
you could be hydrogenating
she could be hydrogenating
we could be hydrogenating
you could be hydrogenating
they could be hydrogenating	I could have hydrogenated
you could have hydrogenated
she could have hydrogenated
we could have hydrogenated
you could have hydrogenated
they could have hydrogenated	I could have been hydrogenating
you could have been hydrogenating
she could have been hydrogenating
we could have been hydrogenating
you could have been hydrogenating
they could have been hydrogenating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't hydrogenate
you couldn't hydrogenate
she couldn't hydrogenate
we couldn't hydrogenate
you couldn't hydrogenate
they couldn't hydrogenate 	I couldn't be hydrogenating
you couldn't be hydrogenating
she couldn't be hydrogenating
we couldn't be hydrogenating
you couldn't be hydrogenating
they couldn't be hydrogenating	I couldn't have hydrogenated
you couldn't have hydrogenated
she couldn't have hydrogenated
we couldn't have hydrogenated
you couldn't have hydrogenated
they couldn't have hydrogenated	I couldn't have been hydrogenating
you couldn't have been hydrogenating
she couldn't have been hydrogenating
we couldn't have been hydrogenating
you couldn't have been hydrogenating
they couldn't have been hydrogenating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I hydrogenate?
could you hydrogenate?
could she hydrogenate?
could we hydrogenate?
could you hydrogenate?
could they hydrogenate? 	could I be hydrogenating?
could you be hydrogenating?
could she be hydrogenating?
could we be hydrogenating?
could you be hydrogenating?
could they be hydrogenating? 	could I have hydrogenated?
could you have hydrogenated?
could she have hydrogenated?
could we have hydrogenated?
could you have hydrogenated?
could they have hydrogenated? 	could I have been hydrogenating?
could you have been hydrogenating?
could she have been hydrogenating?
could we have been hydrogenating?
could you have been hydrogenating?
could they have been hydrogenating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I hydrogenate?
couldn't you hydrogenate?
couldn't she hydrogenate?
couldn't we hydrogenate?
couldn't you hydrogenate?
couldn't they hydrogenate? 	couldn't I be hydrogenating?
couldn't you be hydrogenating?
couldn't she be hydrogenating?
couldn't we be hydrogenating?
couldn't you be hydrogenating?
couldn't they be hydrogenating? 	couldn't I have hydrogenated?
couldn't you have hydrogenated?
couldn't she have hydrogenated?
couldn't we have hydrogenated?
couldn't you have hydrogenated?
couldn't they have hydrogenated? 	couldn't I have been hydrogenating?
couldn't you have been hydrogenating?
couldn't she have been hydrogenating?
couldn't we have been hydrogenating?
couldn't you have been hydrogenating?
couldn't they have been hydrogenating?