could underdress
Verbo regular: underdress - underdressed- underdressed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could underdress
you could underdress
he could underdress
we could underdress
you could underdress
they could underdress 	I could be underdressing
you could be underdressing
he could be underdressing
we could be underdressing
you could be underdressing
they could be underdressing	I could have underdressed
you could have underdressed
he could have underdressed
we could have underdressed
you could have underdressed
they could have underdressed	I could have been underdressing
you could have been underdressing
he could have been underdressing
we could have been underdressing
you could have been underdressing
they could have been underdressing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not underdress
you could not underdress
he could not underdress
we could not underdress
you could not underdress
they could not underdress 	I could not be underdressing
you could not be underdressing
he could not be underdressing
we could not be underdressing
you could not be underdressing
they could not be underdressing	I could not have underdressed
you could not have underdressed
he could not have underdressed
we could not have underdressed
you could not have underdressed
they could not have underdressed	I could not have been underdressing
you could not have been underdressing
he could not have been underdressing
we could not have been underdressing
you could not have been underdressing
they could not have been underdressing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I underdress?
could you underdress?
could he underdress?
could we underdress?
could you underdress?
could they underdress? 	could I be underdressing?
could you be underdressing?
could he be underdressing?
could we be underdressing?
could you be underdressing?
could they be underdressing? 	could I have underdressed?
could you have underdressed?
could he have underdressed?
could we have underdressed?
could you have underdressed?
could they have underdressed? 	could I have been underdressing?
could you have been underdressing?
could he have been underdressing?
could we have been underdressing?
could you have been underdressing?
could they have been underdressing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not underdress?
could you not underdress?
could he not underdress?
could we not underdress?
could you not underdress?
could they not underdress? 	could I not be underdressing?
could you not be underdressing?
could he not be underdressing?
could we not be underdressing?
could you not be underdressing?
could they not be underdressing? 	could I not have underdressed?
could you not have underdressed?
could he not have underdressed?
could we not have underdressed?
could you not have underdressed?
could they not have underdressed? 	could I not have been underdressing?
could you not have been underdressing?
could he not have been underdressing?
could we not have been underdressing?
could you not have been underdressing?
could they not have been underdressing?