can sneeze
Regular verb: sneeze - sneezed- sneezed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sneeze
you can sneeze
she can sneeze
we can sneeze
you can sneeze
they can sneeze 	I can be sneezing
you can be sneezing
she can be sneezing
we can be sneezing
you can be sneezing
they can be sneezing	I can have sneezed
you can have sneezed
she can have sneezed
we can have sneezed
you can have sneezed
they can have sneezed	I can have been sneezing
you can have been sneezing
she can have been sneezing
we can have been sneezing
you can have been sneezing
they can have been sneezing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sneeze
you can't sneeze
she can't sneeze
we can't sneeze
you can't sneeze
they can't sneeze 	I can't be sneezing
you can't be sneezing
she can't be sneezing
we can't be sneezing
you can't be sneezing
they can't be sneezing	I can't have sneezed
you can't have sneezed
she can't have sneezed
we can't have sneezed
you can't have sneezed
they can't have sneezed	I can't have been sneezing
you can't have been sneezing
she can't have been sneezing
we can't have been sneezing
you can't have been sneezing
they can't have been sneezing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sneeze?
can you sneeze?
can she sneeze?
can we sneeze?
can you sneeze?
can they sneeze? 	can I be sneezing?
can you be sneezing?
can she be sneezing?
can we be sneezing?
can you be sneezing?
can they be sneezing? 	can I have sneezed?
can you have sneezed?
can she have sneezed?
can we have sneezed?
can you have sneezed?
can they have sneezed? 	can I have been sneezing?
can you have been sneezing?
can she have been sneezing?
can we have been sneezing?
can you have been sneezing?
can they have been sneezing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sneeze?
can't you sneeze?
can't she sneeze?
can't we sneeze?
can't you sneeze?
can't they sneeze? 	can't I be sneezing?
can't you be sneezing?
can't she be sneezing?
can't we be sneezing?
can't you be sneezing?
can't they be sneezing? 	can't I have sneezed?
can't you have sneezed?
can't she have sneezed?
can't we have sneezed?
can't you have sneezed?
can't they have sneezed? 	can't I have been sneezing?
can't you have been sneezing?
can't she have been sneezing?
can't we have been sneezing?
can't you have been sneezing?
can't they have been sneezing?