can shell
Verbo regular: shell - shelled- shelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can shell
you can shell
she can shell
we can shell
you can shell
they can shell 	I can be shelling
you can be shelling
she can be shelling
we can be shelling
you can be shelling
they can be shelling	I can have shelled
you can have shelled
she can have shelled
we can have shelled
you can have shelled
they can have shelled	I can have been shelling
you can have been shelling
she can have been shelling
we can have been shelling
you can have been shelling
they can have been shelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot shell
you cannot shell
she cannot shell
we cannot shell
you cannot shell
they cannot shell 	I cannot be shelling
you cannot be shelling
she cannot be shelling
we cannot be shelling
you cannot be shelling
they cannot be shelling	I cannot have shelled
you cannot have shelled
she cannot have shelled
we cannot have shelled
you cannot have shelled
they cannot have shelled	I cannot have been shelling
you cannot have been shelling
she cannot have been shelling
we cannot have been shelling
you cannot have been shelling
they cannot have been shelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I shell?
can you shell?
can she shell?
can we shell?
can you shell?
can they shell? 	can I be shelling?
can you be shelling?
can she be shelling?
can we be shelling?
can you be shelling?
can they be shelling? 	can I have shelled?
can you have shelled?
can she have shelled?
can we have shelled?
can you have shelled?
can they have shelled? 	can I have been shelling?
can you have been shelling?
can she have been shelling?
can we have been shelling?
can you have been shelling?
can they have been shelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not shell?
can you not shell?
can she not shell?
can we not shell?
can you not shell?
can they not shell? 	can I not be shelling?
can you not be shelling?
can she not be shelling?
can we not be shelling?
can you not be shelling?
can they not be shelling? 	can I not have shelled?
can you not have shelled?
can she not have shelled?
can we not have shelled?
can you not have shelled?
can they not have shelled? 	can I not have been shelling?
can you not have been shelling?
can she not have been shelling?
can we not have been shelling?
can you not have been shelling?
can they not have been shelling?