English verb conjugation
SHOULD EXCAVATE

Regular verb: excavate - excavated - excavated

Affirmation

Simple form	V-ing form
I'd excavate you'd excavate he'd excavate we'd excavate you'd excavate they'd excavate	I'd be excavating you'd be excavating he'd be excavating we'd be excavating you'd be excavating they'd be excavating
Perfect	V-ing perfect
I should've excavated you should've excavated he should've excavated we should've excavated you should've excavated they should've excavated	I should've been excavating you should've been excavating he should've been excavating we should've been excavating you should've been excavating they should've been excavating

Negation

Simple form	V-ing form
I shouldn't excavate you shouldn't excavate he shouldn't excavate we shouldn't excavate you shouldn't excavate they shouldn't excavate	I shouldn't be excavating you shouldn't be excavating he shouldn't be excavating we shouldn't be excavating you shouldn't be excavating they shouldn't be excavating
Perfect	V-ing perfect
I shouldn't have excavated you shouldn't have excavated he shouldn't have excavated we shouldn't have excavated you shouldn't have excavated they shouldn't have excavated	I shouldn't have been excavating you shouldn't have been excavating he shouldn't have been excavating we shouldn't have been excavating you shouldn't have been excavating they shouldn't have been excavating

Interrogative form

Simple form	V-ing form
should I excavate? should you excavate? should he excavate? should we excavate? should you excavate? should they excavate?	should I be excavating? should you be excavating? should he be excavating? should we be excavating? should you be excavating? should they be excavating?
Perfect	V-ing perfect
should I have excavated? should you have excavated? should he have excavated? should we have excavated? should you have excavated? should they have excavated?	should I have been excavating? should you have been excavating? should he have been excavating? should we have been excavating? should you have been excavating? should they have been excavating?

Interro-negative form

Simple form	V-ing form
shouldn't I excavate? shouldn't you excavate? shouldn't he excavate? shouldn't we excavate? shouldn't you excavate? shouldn't they excavate?	shouldn't I be excavating? shouldn't you be excavating? shouldn't he be excavating? shouldn't we be excavating? shouldn't you be excavating? shouldn't they be excavating?
Perfect	V-ing perfect
shouldn't I have excavated? shouldn't you have excavated? shouldn't he have excavated? shouldn't we have excavated? shouldn't you have excavated? shouldn't they have excavated?	shouldn't I have been excavating? shouldn't you have been excavating? shouldn't he have been excavating? shouldn't we have been excavating? shouldn't you have been excavating? shouldn't they have been excavating?