can grunt
Regular verb: grunt - grunted- grunted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can grunt
you can grunt
she can grunt
we can grunt
you can grunt
they can grunt 	I can be grunting
you can be grunting
she can be grunting
we can be grunting
you can be grunting
they can be grunting	I can have grunted
you can have grunted
she can have grunted
we can have grunted
you can have grunted
they can have grunted	I can have been grunting
you can have been grunting
she can have been grunting
we can have been grunting
you can have been grunting
they can have been grunting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot grunt
you cannot grunt
she cannot grunt
we cannot grunt
you cannot grunt
they cannot grunt 	I cannot be grunting
you cannot be grunting
she cannot be grunting
we cannot be grunting
you cannot be grunting
they cannot be grunting	I cannot have grunted
you cannot have grunted
she cannot have grunted
we cannot have grunted
you cannot have grunted
they cannot have grunted	I cannot have been grunting
you cannot have been grunting
she cannot have been grunting
we cannot have been grunting
you cannot have been grunting
they cannot have been grunting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I grunt?
can you grunt?
can she grunt?
can we grunt?
can you grunt?
can they grunt? 	can I be grunting?
can you be grunting?
can she be grunting?
can we be grunting?
can you be grunting?
can they be grunting? 	can I have grunted?
can you have grunted?
can she have grunted?
can we have grunted?
can you have grunted?
can they have grunted? 	can I have been grunting?
can you have been grunting?
can she have been grunting?
can we have been grunting?
can you have been grunting?
can they have been grunting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not grunt?
can you not grunt?
can she not grunt?
can we not grunt?
can you not grunt?
can they not grunt? 	can I not be grunting?
can you not be grunting?
can she not be grunting?
can we not be grunting?
can you not be grunting?
can they not be grunting? 	can I not have grunted?
can you not have grunted?
can she not have grunted?
can we not have grunted?
can you not have grunted?
can they not have grunted? 	can I not have been grunting?
can you not have been grunting?
can she not have been grunting?
can we not have been grunting?
can you not have been grunting?
can they not have been grunting?