English verb conjugation
SHOULD NIBBLE

Regular verb: nibble - nibbled - nibbled

Affirmation

Simple form	V-ing form
I'd nibble you'd nibble she'd nibble we'd nibble you'd nibble they'd nibble	I'd be nibbling you'd be nibbling she'd be nibbling we'd be nibbling you'd be nibbling they'd be nibbling
Perfect	V-ing perfect
I should've nibbled you should've nibbled she should've nibbled we should've nibbled you should've nibbled they should've nibbled	I should've been nibbling you should've been nibbling she should've been nibbling we should've been nibbling you should've been nibbling they should've been nibbling

Negation

Simple form	V-ing form
I shouldn't nibble you shouldn't nibble she shouldn't nibble we shouldn't nibble you shouldn't nibble they shouldn't nibble	I shouldn't be nibbling you shouldn't be nibbling she shouldn't be nibbling we shouldn't be nibbling you shouldn't be nibbling they shouldn't be nibbling
Perfect	V-ing perfect
I shouldn't have nibbled you shouldn't have nibbled she shouldn't have nibbled we shouldn't have nibbled you shouldn't have nibbled they shouldn't have nibbled	I shouldn't have been nibbling you shouldn't have been nibbling she shouldn't have been nibbling we shouldn't have been nibbling you shouldn't have been nibbling they shouldn't have been nibbling

Interrogative form

Simple form	V-ing form
should I nibble? should you nibble? should she nibble? should we nibble? should you nibble? should they nibble?	should I be nibbling? should you be nibbling? should she be nibbling? should we be nibbling? should you be nibbling? should they be nibbling?
Perfect	V-ing perfect
should I have nibbled? should you have nibbled? should she have nibbled? should we have nibbled? should you have nibbled? should they have nibbled?	should I have been nibbling? should you have been nibbling? should she have been nibbling? should we have been nibbling? should you have been nibbling? should they have been nibbling?

Interro-negative form

Simple form	V-ing form
shouldn't I nibble? shouldn't you nibble? shouldn't she nibble? shouldn't we nibble? shouldn't you nibble? shouldn't they nibble?	shouldn't I be nibbling? shouldn't you be nibbling? shouldn't she be nibbling? shouldn't we be nibbling? shouldn't you be nibbling? shouldn't they be nibbling?
Perfect	V-ing perfect
shouldn't I have nibbled? shouldn't you have nibbled? shouldn't she have nibbled? shouldn't we have nibbled? shouldn't you have nibbled? shouldn't they have nibbled?	shouldn't I have been nibbling? shouldn't you have been nibbling? shouldn't she have been nibbling? shouldn't we have been nibbling? shouldn't you have been nibbling? shouldn't they have been nibbling?