can excavate
Regular verb: excavate - excavated- excavated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?