can clamber
Regular verb: clamber - clambered- clambered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can clamber
you can clamber
he can clamber
we can clamber
you can clamber
they can clamber 	I can be clambering
you can be clambering
he can be clambering
we can be clambering
you can be clambering
they can be clambering	I can have clambered
you can have clambered
he can have clambered
we can have clambered
you can have clambered
they can have clambered	I can have been clambering
you can have been clambering
he can have been clambering
we can have been clambering
you can have been clambering
they can have been clambering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot clamber
you cannot clamber
he cannot clamber
we cannot clamber
you cannot clamber
they cannot clamber 	I cannot be clambering
you cannot be clambering
he cannot be clambering
we cannot be clambering
you cannot be clambering
they cannot be clambering	I cannot have clambered
you cannot have clambered
he cannot have clambered
we cannot have clambered
you cannot have clambered
they cannot have clambered	I cannot have been clambering
you cannot have been clambering
he cannot have been clambering
we cannot have been clambering
you cannot have been clambering
they cannot have been clambering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I clamber?
can you clamber?
can he clamber?
can we clamber?
can you clamber?
can they clamber? 	can I be clambering?
can you be clambering?
can he be clambering?
can we be clambering?
can you be clambering?
can they be clambering? 	can I have clambered?
can you have clambered?
can he have clambered?
can we have clambered?
can you have clambered?
can they have clambered? 	can I have been clambering?
can you have been clambering?
can he have been clambering?
can we have been clambering?
can you have been clambering?
can they have been clambering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not clamber?
can you not clamber?
can he not clamber?
can we not clamber?
can you not clamber?
can they not clamber? 	can I not be clambering?
can you not be clambering?
can he not be clambering?
can we not be clambering?
can you not be clambering?
can they not be clambering? 	can I not have clambered?
can you not have clambered?
can he not have clambered?
can we not have clambered?
can you not have clambered?
can they not have clambered? 	can I not have been clambering?
can you not have been clambering?
can he not have been clambering?
can we not have been clambering?
can you not have been clambering?
can they not have been clambering?