Conjugación del verbo inglés
SHOULD UNDERPIN

Verbo regular: underpin - underpinned - underpinned

Afirmación

Forma simple	Forma con V-ing
I should underpin you should underpin he should underpin we should underpin you should underpin they should underpin	I should be underpinning you should be underpinning he should be underpinning we should be underpinning you should be underpinning they should be underpinning
Perfecto	Perfecto con V-ing
I should have underpinned you should have underpinned he 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 he should have been underpinning we should have been underpinning you should have been underpinning they should have been underpinning

Negación

Forma simple	Forma con V-ing
I should not underpin you should not underpin he 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 he should not be underpinning we should not be underpinning you should not be underpinning they should not be underpinning
Perfecto	Perfecto con V-ing
I should not have underpinned you should not have underpinned he 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 he should not have been underpinning we should not have been underpinning you should not have been underpinning they should not have been underpinning

Forma interrogativa

Forma simple	Forma con V-ing
should I underpin? should you underpin? should he underpin? should we underpin? should you underpin? should they underpin?	should I be underpinning? should you be underpinning? should he be underpinning? should we be underpinning? should you be underpinning? should they be underpinning?
Perfecto	Perfecto con V-ing
should I have underpinned? should you have underpinned? should he 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 he have been underpinning? should we have been underpinning? should you have been underpinning? should they have been underpinning?

Forma interro-negativa

Forma simple	Forma con V-ing
should I not underpin? should you not underpin? should he 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 he not be underpinning? should we not be underpinning? should you not be underpinning? should they not be underpinning?
Perfecto	Perfecto con V-ing
should I not have underpinned? should you not have underpinned? should he 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 he not have been underpinning? should we not have been underpinning? should you not have been underpinning? should they not have been underpinning?