English verb conjugation
CAN UNDERDRESS

Regular verb: underdress - underdressed - underdressed

Affirmation

Simple form	V-ing form
I can underdress you can underdress he can underdress we can underdress you can underdress they can underdress	I can be underdressing you can be underdressing he can be underdressing we can be underdressing you can be underdressing they can be underdressing
Perfect	V-ing perfect
I can have underdressed you can have underdressed he can have underdressed we can have underdressed you can have underdressed they can have underdressed	I can have been underdressing you can have been underdressing he can have been underdressing we can have been underdressing you can have been underdressing they can have been underdressing

Negation

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

Interrogative form

Simple form	V-ing form
can I underdress? can you underdress? can he underdress? can we underdress? can you underdress? can they underdress?	can I be underdressing? can you be underdressing? can he be underdressing? can we be underdressing? can you be underdressing? can they be underdressing?
Perfect	V-ing perfect
can I have underdressed? can you have underdressed? can he have underdressed? can we have underdressed? can you have underdressed? can they have underdressed?	can I have been underdressing? can you have been underdressing? can he have been underdressing? can we have been underdressing? can you have been underdressing? can they have been underdressing?

Interro-negative form

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