English verb conjugation
SHOULD RETREAD

Regular verb: retread - retreaded - retreaded

Affirmation

Simple form	V-ing form
I'd retread you'd retread she'd retread we'd retread you'd retread they'd retread	I'd be retreading you'd be retreading she'd be retreading we'd be retreading you'd be retreading they'd be retreading
Perfect	V-ing perfect
I should've retreaded you should've retreaded she should've retreaded we should've retreaded you should've retreaded they should've retreaded	I should've been retreading you should've been retreading she should've been retreading we should've been retreading you should've been retreading they should've been retreading

Negation

Simple form	V-ing form
I shouldn't retread you shouldn't retread she shouldn't retread we shouldn't retread you shouldn't retread they shouldn't retread	I shouldn't be retreading you shouldn't be retreading she shouldn't be retreading we shouldn't be retreading you shouldn't be retreading they shouldn't be retreading
Perfect	V-ing perfect
I shouldn't have retreaded you shouldn't have retreaded she shouldn't have retreaded we shouldn't have retreaded you shouldn't have retreaded they shouldn't have retreaded	I shouldn't have been retreading you shouldn't have been retreading she shouldn't have been retreading we shouldn't have been retreading you shouldn't have been retreading they shouldn't have been retreading

Interrogative form

Simple form	V-ing form
should I retread? should you retread? should she retread? should we retread? should you retread? should they retread?	should I be retreading? should you be retreading? should she be retreading? should we be retreading? should you be retreading? should they be retreading?
Perfect	V-ing perfect
should I have retreaded? should you have retreaded? should she have retreaded? should we have retreaded? should you have retreaded? should they have retreaded?	should I have been retreading? should you have been retreading? should she have been retreading? should we have been retreading? should you have been retreading? should they have been retreading?

Interro-negative form

Simple form	V-ing form
shouldn't I retread? shouldn't you retread? shouldn't she retread? shouldn't we retread? shouldn't you retread? shouldn't they retread?	shouldn't I be retreading? shouldn't you be retreading? shouldn't she be retreading? shouldn't we be retreading? shouldn't you be retreading? shouldn't they be retreading?
Perfect	V-ing perfect
shouldn't I have retreaded? shouldn't you have retreaded? shouldn't she have retreaded? shouldn't we have retreaded? shouldn't you have retreaded? shouldn't they have retreaded?	shouldn't I have been retreading? shouldn't you have been retreading? shouldn't she have been retreading? shouldn't we have been retreading? shouldn't you have been retreading? shouldn't they have been retreading?