can grunt
Regular verb: grunt - grunted- grunted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can grunt
you can grunt
he can grunt
we can grunt
you can grunt
they can grunt 	I can be grunting
you can be grunting
he can be grunting
we can be grunting
you can be grunting
they can be grunting	I can have grunted
you can have grunted
he 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
he 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
he cannot grunt
we cannot grunt
you cannot grunt
they cannot grunt 	I cannot be grunting
you cannot be grunting
he cannot be grunting
we cannot be grunting
you cannot be grunting
they cannot be grunting	I cannot have grunted
you cannot have grunted
he 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
he 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 he grunt?
can we grunt?
can you grunt?
can they grunt? 	can I be grunting?
can you be grunting?
can he be grunting?
can we be grunting?
can you be grunting?
can they be grunting? 	can I have grunted?
can you have grunted?
can he 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 he 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 he 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 he 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 he 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 he not have been grunting?
can we not have been grunting?
can you not have been grunting?
can they not have been grunting?