English verb conjugation
COULD UNDERDRESS

Regular verb: underdress - underdressed - underdressed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I couldn't underdress you couldn't underdress he couldn't underdress we couldn't underdress you couldn't underdress they couldn't underdress	I couldn't be underdressing you couldn't be underdressing he couldn't be underdressing we couldn't be underdressing you couldn't be underdressing they couldn't be underdressing
Perfect	V-ing perfect
I couldn't have underdressed you couldn't have underdressed he couldn't have underdressed we couldn't have underdressed you couldn't have underdressed they couldn't have underdressed	I couldn't have been underdressing you couldn't have been underdressing he couldn't have been underdressing we couldn't have been underdressing you couldn't have been underdressing they couldn't have been underdressing

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
couldn't I underdress? couldn't you underdress? couldn't he underdress? couldn't we underdress? couldn't you underdress? couldn't they underdress?	couldn't I be underdressing? couldn't you be underdressing? couldn't he be underdressing? couldn't we be underdressing? couldn't you be underdressing? couldn't they be underdressing?
Perfect	V-ing perfect
couldn't I have underdressed? couldn't you have underdressed? couldn't he have underdressed? couldn't we have underdressed? couldn't you have underdressed? couldn't they have underdressed?	couldn't I have been underdressing? couldn't you have been underdressing? couldn't he have been underdressing? couldn't we have been underdressing? couldn't you have been underdressing? couldn't they have been underdressing?