shall underpin
Regular verb: underpin - underpinned- underpinned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall underpin
you shall underpin
she shall underpin
we shall underpin
you shall underpin
they shall underpin 	I shall be underpinning
you shall be underpinning
she shall be underpinning
we shall be underpinning
you shall be underpinning
they shall be underpinning	I shall have underpinned
you shall have underpinned
she shall have underpinned
we shall have underpinned
you shall have underpinned
they shall have underpinned	I shall have been underpinning
you shall have been underpinning
she shall have been underpinning
we shall have been underpinning
you shall have been underpinning
they shall have been underpinning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not underpin
you shall not underpin
she shall not underpin
we shall not underpin
you shall not underpin
they shall not underpin 	I shall not be underpinning
you shall not be underpinning
she shall not be underpinning
we shall not be underpinning
you shall not be underpinning
they shall not be underpinning	I shall not have underpinned
you shall not have underpinned
she shall not have underpinned
we shall not have underpinned
you shall not have underpinned
they shall not have underpinned	I shall not have been underpinning
you shall not have been underpinning
she shall not have been underpinning
we shall not have been underpinning
you shall not have been underpinning
they shall not have been underpinning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I underpin?
shall you underpin?
shall she underpin?
shall we underpin?
shall you underpin?
shall they underpin? 	shall I be underpinning?
shall you be underpinning?
shall she be underpinning?
shall we be underpinning?
shall you be underpinning?
shall they be underpinning? 	shall I have underpinned?
shall you have underpinned?
shall she have underpinned?
shall we have underpinned?
shall you have underpinned?
shall they have underpinned? 	shall I have been underpinning?
shall you have been underpinning?
shall she have been underpinning?
shall we have been underpinning?
shall you have been underpinning?
shall they have been underpinning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not underpin?
shall you not underpin?
shall she not underpin?
shall we not underpin?
shall you not underpin?
shall they not underpin? 	shall I not be underpinning?
shall you not be underpinning?
shall she not be underpinning?
shall we not be underpinning?
shall you not be underpinning?
shall they not be underpinning? 	shall I not have underpinned?
shall you not have underpinned?
shall she not have underpinned?
shall we not have underpinned?
shall you not have underpinned?
shall they not have underpinned? 	shall I not have been underpinning?
shall you not have been underpinning?
shall she not have been underpinning?
shall we not have been underpinning?
shall you not have been underpinning?
shall they not have been underpinning?