English verb conjugation
SHOULD GRASS

Regular verb: grass - grassed - grassed

Affirmation

Simple form	V-ing form
I'd grass you'd grass he'd grass we'd grass you'd grass they'd grass	I'd be grassing you'd be grassing he'd be grassing we'd be grassing you'd be grassing they'd be grassing
Perfect	V-ing perfect
I should've grassed you should've grassed he should've grassed we should've grassed you should've grassed they should've grassed	I should've been grassing you should've been grassing he should've been grassing we should've been grassing you should've been grassing they should've been grassing

Negation

Simple form	V-ing form
I shouldn't grass you shouldn't grass he shouldn't grass we shouldn't grass you shouldn't grass they shouldn't grass	I shouldn't be grassing you shouldn't be grassing he shouldn't be grassing we shouldn't be grassing you shouldn't be grassing they shouldn't be grassing
Perfect	V-ing perfect
I shouldn't have grassed you shouldn't have grassed he shouldn't have grassed we shouldn't have grassed you shouldn't have grassed they shouldn't have grassed	I shouldn't have been grassing you shouldn't have been grassing he shouldn't have been grassing we shouldn't have been grassing you shouldn't have been grassing they shouldn't have been grassing

Interrogative form

Simple form	V-ing form
should I grass? should you grass? should he grass? should we grass? should you grass? should they grass?	should I be grassing? should you be grassing? should he be grassing? should we be grassing? should you be grassing? should they be grassing?
Perfect	V-ing perfect
should I have grassed? should you have grassed? should he have grassed? should we have grassed? should you have grassed? should they have grassed?	should I have been grassing? should you have been grassing? should he have been grassing? should we have been grassing? should you have been grassing? should they have been grassing?

Interro-negative form

Simple form	V-ing form
shouldn't I grass? shouldn't you grass? shouldn't he grass? shouldn't we grass? shouldn't you grass? shouldn't they grass?	shouldn't I be grassing? shouldn't you be grassing? shouldn't he be grassing? shouldn't we be grassing? shouldn't you be grassing? shouldn't they be grassing?
Perfect	V-ing perfect
shouldn't I have grassed? shouldn't you have grassed? shouldn't he have grassed? shouldn't we have grassed? shouldn't you have grassed? shouldn't they have grassed?	shouldn't I have been grassing? shouldn't you have been grassing? shouldn't he have been grassing? shouldn't we have been grassing? shouldn't you have been grassing? shouldn't they have been grassing?