English verb conjugation
CAN EXCAVATE

Regular verb: excavate - excavated - excavated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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