can sheave
Regular verb: sheave - sheaved- sheaved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sheave
you can sheave
she can sheave
we can sheave
you can sheave
they can sheave 	I can be sheaving
you can be sheaving
she can be sheaving
we can be sheaving
you can be sheaving
they can be sheaving	I can have sheaved
you can have sheaved
she can have sheaved
we can have sheaved
you can have sheaved
they can have sheaved	I can have been sheaving
you can have been sheaving
she can have been sheaving
we can have been sheaving
you can have been sheaving
they can have been sheaving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sheave
you can't sheave
she can't sheave
we can't sheave
you can't sheave
they can't sheave 	I can't be sheaving
you can't be sheaving
she can't be sheaving
we can't be sheaving
you can't be sheaving
they can't be sheaving	I can't have sheaved
you can't have sheaved
she can't have sheaved
we can't have sheaved
you can't have sheaved
they can't have sheaved	I can't have been sheaving
you can't have been sheaving
she can't have been sheaving
we can't have been sheaving
you can't have been sheaving
they can't have been sheaving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sheave?
can you sheave?
can she sheave?
can we sheave?
can you sheave?
can they sheave? 	can I be sheaving?
can you be sheaving?
can she be sheaving?
can we be sheaving?
can you be sheaving?
can they be sheaving? 	can I have sheaved?
can you have sheaved?
can she have sheaved?
can we have sheaved?
can you have sheaved?
can they have sheaved? 	can I have been sheaving?
can you have been sheaving?
can she have been sheaving?
can we have been sheaving?
can you have been sheaving?
can they have been sheaving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sheave?
can't you sheave?
can't she sheave?
can't we sheave?
can't you sheave?
can't they sheave? 	can't I be sheaving?
can't you be sheaving?
can't she be sheaving?
can't we be sheaving?
can't you be sheaving?
can't they be sheaving? 	can't I have sheaved?
can't you have sheaved?
can't she have sheaved?
can't we have sheaved?
can't you have sheaved?
can't they have sheaved? 	can't I have been sheaving?
can't you have been sheaving?
can't she have been sheaving?
can't we have been sheaving?
can't you have been sheaving?
can't they have been sheaving?