can sphere
Regular verb: sphere - sphered- sphered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sphere
you can sphere
he can sphere
we can sphere
you can sphere
they can sphere 	I can be sphering
you can be sphering
he can be sphering
we can be sphering
you can be sphering
they can be sphering	I can have sphered
you can have sphered
he can have sphered
we can have sphered
you can have sphered
they can have sphered	I can have been sphering
you can have been sphering
he can have been sphering
we can have been sphering
you can have been sphering
they can have been sphering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot sphere
you cannot sphere
he cannot sphere
we cannot sphere
you cannot sphere
they cannot sphere 	I cannot be sphering
you cannot be sphering
he cannot be sphering
we cannot be sphering
you cannot be sphering
they cannot be sphering	I cannot have sphered
you cannot have sphered
he cannot have sphered
we cannot have sphered
you cannot have sphered
they cannot have sphered	I cannot have been sphering
you cannot have been sphering
he cannot have been sphering
we cannot have been sphering
you cannot have been sphering
they cannot have been sphering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sphere?
can you sphere?
can he sphere?
can we sphere?
can you sphere?
can they sphere? 	can I be sphering?
can you be sphering?
can he be sphering?
can we be sphering?
can you be sphering?
can they be sphering? 	can I have sphered?
can you have sphered?
can he have sphered?
can we have sphered?
can you have sphered?
can they have sphered? 	can I have been sphering?
can you have been sphering?
can he have been sphering?
can we have been sphering?
can you have been sphering?
can they have been sphering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not sphere?
can you not sphere?
can he not sphere?
can we not sphere?
can you not sphere?
can they not sphere? 	can I not be sphering?
can you not be sphering?
can he not be sphering?
can we not be sphering?
can you not be sphering?
can they not be sphering? 	can I not have sphered?
can you not have sphered?
can he not have sphered?
can we not have sphered?
can you not have sphered?
can they not have sphered? 	can I not have been sphering?
can you not have been sphering?
can he not have been sphering?
can we not have been sphering?
can you not have been sphering?
can they not have been sphering?