could underprop
Verbe régulier : underprop - underproped- underproped

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could underprop
you could underprop
she could underprop
we could underprop
you could underprop
they could underprop 	I could be underproping
you could be underproping
she could be underproping
we could be underproping
you could be underproping
they could be underproping	I could have underproped
you could have underproped
she could have underproped
we could have underproped
you could have underproped
they could have underproped	I could have been underproping
you could have been underproping
she could have been underproping
we could have been underproping
you could have been underproping
they could have been underproping	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't underprop
you couldn't underprop
she couldn't underprop
we couldn't underprop
you couldn't underprop
they couldn't underprop 	I couldn't be underproping
you couldn't be underproping
she couldn't be underproping
we couldn't be underproping
you couldn't be underproping
they couldn't be underproping	I couldn't have underproped
you couldn't have underproped
she couldn't have underproped
we couldn't have underproped
you couldn't have underproped
they couldn't have underproped	I couldn't have been underproping
you couldn't have been underproping
she couldn't have been underproping
we couldn't have been underproping
you couldn't have been underproping
they couldn't have been underproping	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I underprop?
could you underprop?
could she underprop?
could we underprop?
could you underprop?
could they underprop? 	could I be underproping?
could you be underproping?
could she be underproping?
could we be underproping?
could you be underproping?
could they be underproping? 	could I have underproped?
could you have underproped?
could she have underproped?
could we have underproped?
could you have underproped?
could they have underproped? 	could I have been underproping?
could you have been underproping?
could she have been underproping?
could we have been underproping?
could you have been underproping?
could they have been underproping? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I underprop?
couldn't you underprop?
couldn't she underprop?
couldn't we underprop?
couldn't you underprop?
couldn't they underprop? 	couldn't I be underproping?
couldn't you be underproping?
couldn't she be underproping?
couldn't we be underproping?
couldn't you be underproping?
couldn't they be underproping? 	couldn't I have underproped?
couldn't you have underproped?
couldn't she have underproped?
couldn't we have underproped?
couldn't you have underproped?
couldn't they have underproped? 	couldn't I have been underproping?
couldn't you have been underproping?
couldn't she have been underproping?
couldn't we have been underproping?
couldn't you have been underproping?
couldn't they have been underproping?