English verb conjugation
SHOULD SHELL

Regular verb: shell - shelled - shelled

Affirmation

Simple form	V-ing form
I'd shell you'd shell she'd shell we'd shell you'd shell they'd shell	I'd be shelling you'd be shelling she'd be shelling we'd be shelling you'd be shelling they'd be shelling
Perfect	V-ing perfect
I should've shelled you should've shelled she should've shelled we should've shelled you should've shelled they should've shelled	I should've been shelling you should've been shelling she should've been shelling we should've been shelling you should've been shelling they should've been shelling

Negation

Simple form	V-ing form
I shouldn't shell you shouldn't shell she shouldn't shell we shouldn't shell you shouldn't shell they shouldn't shell	I shouldn't be shelling you shouldn't be shelling she shouldn't be shelling we shouldn't be shelling you shouldn't be shelling they shouldn't be shelling
Perfect	V-ing perfect
I shouldn't have shelled you shouldn't have shelled she shouldn't have shelled we shouldn't have shelled you shouldn't have shelled they shouldn't have shelled	I shouldn't have been shelling you shouldn't have been shelling she shouldn't have been shelling we shouldn't have been shelling you shouldn't have been shelling they shouldn't have been shelling

Interrogative form

Simple form	V-ing form
should I shell? should you shell? should she shell? should we shell? should you shell? should they shell?	should I be shelling? should you be shelling? should she be shelling? should we be shelling? should you be shelling? should they be shelling?
Perfect	V-ing perfect
should I have shelled? should you have shelled? should she have shelled? should we have shelled? should you have shelled? should they have shelled?	should I have been shelling? should you have been shelling? should she have been shelling? should we have been shelling? should you have been shelling? should they have been shelling?

Interro-negative form

Simple form	V-ing form
shouldn't I shell? shouldn't you shell? shouldn't she shell? shouldn't we shell? shouldn't you shell? shouldn't they shell?	shouldn't I be shelling? shouldn't you be shelling? shouldn't she be shelling? shouldn't we be shelling? shouldn't you be shelling? shouldn't they be shelling?
Perfect	V-ing perfect
shouldn't I have shelled? shouldn't you have shelled? shouldn't she have shelled? shouldn't we have shelled? shouldn't you have shelled? shouldn't they have shelled?	shouldn't I have been shelling? shouldn't you have been shelling? shouldn't she have been shelling? shouldn't we have been shelling? shouldn't you have been shelling? shouldn't they have been shelling?