can clabber
Regular verb: clabber - clabbered- clabbered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can clabber
you can clabber
he can clabber
we can clabber
you can clabber
they can clabber 	I can be clabbering
you can be clabbering
he can be clabbering
we can be clabbering
you can be clabbering
they can be clabbering	I can have clabbered
you can have clabbered
he can have clabbered
we can have clabbered
you can have clabbered
they can have clabbered	I can have been clabbering
you can have been clabbering
he can have been clabbering
we can have been clabbering
you can have been clabbering
they can have been clabbering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot clabber
you cannot clabber
he cannot clabber
we cannot clabber
you cannot clabber
they cannot clabber 	I cannot be clabbering
you cannot be clabbering
he cannot be clabbering
we cannot be clabbering
you cannot be clabbering
they cannot be clabbering	I cannot have clabbered
you cannot have clabbered
he cannot have clabbered
we cannot have clabbered
you cannot have clabbered
they cannot have clabbered	I cannot have been clabbering
you cannot have been clabbering
he cannot have been clabbering
we cannot have been clabbering
you cannot have been clabbering
they cannot have been clabbering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I clabber?
can you clabber?
can he clabber?
can we clabber?
can you clabber?
can they clabber? 	can I be clabbering?
can you be clabbering?
can he be clabbering?
can we be clabbering?
can you be clabbering?
can they be clabbering? 	can I have clabbered?
can you have clabbered?
can he have clabbered?
can we have clabbered?
can you have clabbered?
can they have clabbered? 	can I have been clabbering?
can you have been clabbering?
can he have been clabbering?
can we have been clabbering?
can you have been clabbering?
can they have been clabbering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not clabber?
can you not clabber?
can he not clabber?
can we not clabber?
can you not clabber?
can they not clabber? 	can I not be clabbering?
can you not be clabbering?
can he not be clabbering?
can we not be clabbering?
can you not be clabbering?
can they not be clabbering? 	can I not have clabbered?
can you not have clabbered?
can he not have clabbered?
can we not have clabbered?
can you not have clabbered?
can they not have clabbered? 	can I not have been clabbering?
can you not have been clabbering?
can he not have been clabbering?
can we not have been clabbering?
can you not have been clabbering?
can they not have been clabbering?