English verb conjugation
CAN UPHOLD

Irregular verb: uphold - upheld - upheld

Affirmation

Simple form	V-ing form
I can uphold you can uphold she can uphold we can uphold you can uphold they can uphold	I can be upholding you can be upholding she can be upholding we can be upholding you can be upholding they can be upholding
Perfect	V-ing perfect
I can have upheld you can have upheld she can have upheld we can have upheld you can have upheld they can have upheld	I can have been upholding you can have been upholding she can have been upholding we can have been upholding you can have been upholding they can have been upholding

Negation

Simple form	V-ing form
I can't uphold you can't uphold she can't uphold we can't uphold you can't uphold they can't uphold	I can't be upholding you can't be upholding she can't be upholding we can't be upholding you can't be upholding they can't be upholding
Perfect	V-ing perfect
I can't have upheld you can't have upheld she can't have upheld we can't have upheld you can't have upheld they can't have upheld	I can't have been upholding you can't have been upholding she can't have been upholding we can't have been upholding you can't have been upholding they can't have been upholding

Interrogative form

Simple form	V-ing form
can I uphold? can you uphold? can she uphold? can we uphold? can you uphold? can they uphold?	can I be upholding? can you be upholding? can she be upholding? can we be upholding? can you be upholding? can they be upholding?
Perfect	V-ing perfect
can I have upheld? can you have upheld? can she have upheld? can we have upheld? can you have upheld? can they have upheld?	can I have been upholding? can you have been upholding? can she have been upholding? can we have been upholding? can you have been upholding? can they have been upholding?

Interro-negative form

Simple form	V-ing form
can't I uphold? can't you uphold? can't she uphold? can't we uphold? can't you uphold? can't they uphold?	can't I be upholding? can't you be upholding? can't she be upholding? can't we be upholding? can't you be upholding? can't they be upholding?
Perfect	V-ing perfect
can't I have upheld? can't you have upheld? can't she have upheld? can't we have upheld? can't you have upheld? can't they have upheld?	can't I have been upholding? can't you have been upholding? can't she have been upholding? can't we have been upholding? can't you have been upholding? can't they have been upholding?