should underpin
Verbe régulier : underpin - underpinned- underpinned
Traduction française : soutenir - étayer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should underpin
you should underpin
she should underpin
we should underpin
you should underpin
they should underpin 	I should be underpinning
you should be underpinning
she should be underpinning
we should be underpinning
you should be underpinning
they should be underpinning	I should have underpinned
you should have underpinned
she should have underpinned
we should have underpinned
you should have underpinned
they should have underpinned	I should have been underpinning
you should have been underpinning
she should have been underpinning
we should have been underpinning
you should have been underpinning
they should have been underpinning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not underpin
you should not underpin
she should not underpin
we should not underpin
you should not underpin
they should not underpin 	I should not be underpinning
you should not be underpinning
she should not be underpinning
we should not be underpinning
you should not be underpinning
they should not be underpinning	I should not have underpinned
you should not have underpinned
she should not have underpinned
we should not have underpinned
you should not have underpinned
they should not have underpinned	I should not have been underpinning
you should not have been underpinning
she should not have been underpinning
we should not have been underpinning
you should not have been underpinning
they should not have been underpinning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I underpin?
should you underpin?
should she underpin?
should we underpin?
should you underpin?
should they underpin? 	should I be underpinning?
should you be underpinning?
should she be underpinning?
should we be underpinning?
should you be underpinning?
should they be underpinning? 	should I have underpinned?
should you have underpinned?
should she have underpinned?
should we have underpinned?
should you have underpinned?
should they have underpinned? 	should I have been underpinning?
should you have been underpinning?
should she have been underpinning?
should we have been underpinning?
should you have been underpinning?
should they have been underpinning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I not underpin?
should you not underpin?
should she not underpin?
should we not underpin?
should you not underpin?
should they not underpin? 	should I not be underpinning?
should you not be underpinning?
should she not be underpinning?
should we not be underpinning?
should you not be underpinning?
should they not be underpinning? 	should I not have underpinned?
should you not have underpinned?
should she not have underpinned?
should we not have underpinned?
should you not have underpinned?
should they not have underpinned? 	should I not have been underpinning?
should you not have been underpinning?
should she not have been underpinning?
should we not have been underpinning?
should you not have been underpinning?
should they not have been underpinning?