English verb conjugation
CAN UPHOLD

Irregular verb: uphold - upheld - upheld

Affirmation

Simple form	V-ing form
I can uphold you can uphold he can uphold we can uphold you can uphold they can uphold	I can be upholding you can be upholding he 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 he 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 he 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 he 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 he 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 he 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 he 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 he uphold? can we uphold? can you uphold? can they uphold?	can I be upholding? can you be upholding? can he 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 he 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 he 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 he 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 he 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 he 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 he have been upholding? can't we have been upholding? can't you have been upholding? can't they have been upholding?