must underpin
Regelmä&szlig;iges Verb: underpin - underpinned- underpinned

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must underpin
you must underpin
he must underpin
we must underpin
you must underpin
they must underpin 	I must be underpinning
you must be underpinning
he must be underpinning
we must be underpinning
you must be underpinning
they must be underpinning	I must have underpinned
you must have underpinned
he must have underpinned
we must have underpinned
you must have underpinned
they must have underpinned	I must have been underpinning
you must have been underpinning
he must have been underpinning
we must have been underpinning
you must have been underpinning
they must have been underpinning	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not underpin
you must not underpin
he must not underpin
we must not underpin
you must not underpin
they must not underpin 	I must not be underpinning
you must not be underpinning
he must not be underpinning
we must not be underpinning
you must not be underpinning
they must not be underpinning	I must not have underpinned
you must not have underpinned
he must not have underpinned
we must not have underpinned
you must not have underpinned
they must not have underpinned	I must not have been underpinning
you must not have been underpinning
he must not have been underpinning
we must not have been underpinning
you must not have been underpinning
they must not have been underpinning	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I underpin?
must you underpin?
must he underpin?
must we underpin?
must you underpin?
must they underpin? 	must I be underpinning?
must you be underpinning?
must he be underpinning?
must we be underpinning?
must you be underpinning?
must they be underpinning? 	must I have underpinned?
must you have underpinned?
must he have underpinned?
must we have underpinned?
must you have underpinned?
must they have underpinned? 	must I have been underpinning?
must you have been underpinning?
must he have been underpinning?
must we have been underpinning?
must you have been underpinning?
must they have been underpinning? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not underpin?
must you not underpin?
must he not underpin?
must we not underpin?
must you not underpin?
must they not underpin? 	must I not be underpinning?
must you not be underpinning?
must he not be underpinning?
must we not be underpinning?
must you not be underpinning?
must they not be underpinning? 	must I not have underpinned?
must you not have underpinned?
must he not have underpinned?
must we not have underpinned?
must you not have underpinned?
must they not have underpinned? 	must I not have been underpinning?
must you not have been underpinning?
must he not have been underpinning?
must we not have been underpinning?
must you not have been underpinning?
must they not have been underpinning?