can clunk
Regular verb: clunk - clunked- clunked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can clunk
you can clunk
she can clunk
we can clunk
you can clunk
they can clunk 	I can be clunking
you can be clunking
she can be clunking
we can be clunking
you can be clunking
they can be clunking	I can have clunked
you can have clunked
she can have clunked
we can have clunked
you can have clunked
they can have clunked	I can have been clunking
you can have been clunking
she can have been clunking
we can have been clunking
you can have been clunking
they can have been clunking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot clunk
you cannot clunk
she cannot clunk
we cannot clunk
you cannot clunk
they cannot clunk 	I cannot be clunking
you cannot be clunking
she cannot be clunking
we cannot be clunking
you cannot be clunking
they cannot be clunking	I cannot have clunked
you cannot have clunked
she cannot have clunked
we cannot have clunked
you cannot have clunked
they cannot have clunked	I cannot have been clunking
you cannot have been clunking
she cannot have been clunking
we cannot have been clunking
you cannot have been clunking
they cannot have been clunking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I clunk?
can you clunk?
can she clunk?
can we clunk?
can you clunk?
can they clunk? 	can I be clunking?
can you be clunking?
can she be clunking?
can we be clunking?
can you be clunking?
can they be clunking? 	can I have clunked?
can you have clunked?
can she have clunked?
can we have clunked?
can you have clunked?
can they have clunked? 	can I have been clunking?
can you have been clunking?
can she have been clunking?
can we have been clunking?
can you have been clunking?
can they have been clunking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not clunk?
can you not clunk?
can she not clunk?
can we not clunk?
can you not clunk?
can they not clunk? 	can I not be clunking?
can you not be clunking?
can she not be clunking?
can we not be clunking?
can you not be clunking?
can they not be clunking? 	can I not have clunked?
can you not have clunked?
can she not have clunked?
can we not have clunked?
can you not have clunked?
can they not have clunked? 	can I not have been clunking?
can you not have been clunking?
can she not have been clunking?
can we not have been clunking?
can you not have been clunking?
can they not have been clunking?