English verb conjugation
SHOULD TAIL

Regular verb: tail - tailed - tailed

Affirmation

Simple form	V-ing form
I'd tail you'd tail she'd tail we'd tail you'd tail they'd tail	I'd be tailing you'd be tailing she'd be tailing we'd be tailing you'd be tailing they'd be tailing
Perfect	V-ing perfect
I should've tailed you should've tailed she should've tailed we should've tailed you should've tailed they should've tailed	I should've been tailing you should've been tailing she should've been tailing we should've been tailing you should've been tailing they should've been tailing

Negation

Simple form	V-ing form
I shouldn't tail you shouldn't tail she shouldn't tail we shouldn't tail you shouldn't tail they shouldn't tail	I shouldn't be tailing you shouldn't be tailing she shouldn't be tailing we shouldn't be tailing you shouldn't be tailing they shouldn't be tailing
Perfect	V-ing perfect
I shouldn't have tailed you shouldn't have tailed she shouldn't have tailed we shouldn't have tailed you shouldn't have tailed they shouldn't have tailed	I shouldn't have been tailing you shouldn't have been tailing she shouldn't have been tailing we shouldn't have been tailing you shouldn't have been tailing they shouldn't have been tailing

Interrogative form

Simple form	V-ing form
should I tail? should you tail? should she tail? should we tail? should you tail? should they tail?	should I be tailing? should you be tailing? should she be tailing? should we be tailing? should you be tailing? should they be tailing?
Perfect	V-ing perfect
should I have tailed? should you have tailed? should she have tailed? should we have tailed? should you have tailed? should they have tailed?	should I have been tailing? should you have been tailing? should she have been tailing? should we have been tailing? should you have been tailing? should they have been tailing?

Interro-negative form

Simple form	V-ing form
shouldn't I tail? shouldn't you tail? shouldn't she tail? shouldn't we tail? shouldn't you tail? shouldn't they tail?	shouldn't I be tailing? shouldn't you be tailing? shouldn't she be tailing? shouldn't we be tailing? shouldn't you be tailing? shouldn't they be tailing?
Perfect	V-ing perfect
shouldn't I have tailed? shouldn't you have tailed? shouldn't she have tailed? shouldn't we have tailed? shouldn't you have tailed? shouldn't they have tailed?	shouldn't I have been tailing? shouldn't you have been tailing? shouldn't she have been tailing? shouldn't we have been tailing? shouldn't you have been tailing? shouldn't they have been tailing?