must timber
Verbo regular: timber - timbered- timbered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must timber
you must timber
he must timber
we must timber
you must timber
they must timber 	I must be timbering
you must be timbering
he must be timbering
we must be timbering
you must be timbering
they must be timbering	I must have timbered
you must have timbered
he must have timbered
we must have timbered
you must have timbered
they must have timbered	I must have been timbering
you must have been timbering
he must have been timbering
we must have been timbering
you must have been timbering
they must have been timbering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't timber
you mustn't timber
he mustn't timber
we mustn't timber
you mustn't timber
they mustn't timber 	I mustn't be timbering
you mustn't be timbering
he mustn't be timbering
we mustn't be timbering
you mustn't be timbering
they mustn't be timbering	I mustn't have timbered
you mustn't have timbered
he mustn't have timbered
we mustn't have timbered
you mustn't have timbered
they mustn't have timbered	I mustn't have been timbering
you mustn't have been timbering
he mustn't have been timbering
we mustn't have been timbering
you mustn't have been timbering
they mustn't have been timbering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I timber?
must you timber?
must he timber?
must we timber?
must you timber?
must they timber? 	must I be timbering?
must you be timbering?
must he be timbering?
must we be timbering?
must you be timbering?
must they be timbering? 	must I have timbered?
must you have timbered?
must he have timbered?
must we have timbered?
must you have timbered?
must they have timbered? 	must I have been timbering?
must you have been timbering?
must he have been timbering?
must we have been timbering?
must you have been timbering?
must they have been timbering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I timber?
mustn't you timber?
mustn't he timber?
mustn't we timber?
mustn't you timber?
mustn't they timber? 	mustn't I be timbering?
mustn't you be timbering?
mustn't he be timbering?
mustn't we be timbering?
mustn't you be timbering?
mustn't they be timbering? 	mustn't I have timbered?
mustn't you have timbered?
mustn't he have timbered?
mustn't we have timbered?
mustn't you have timbered?
mustn't they have timbered? 	mustn't I have been timbering?
mustn't you have been timbering?
mustn't he have been timbering?
mustn't we have been timbering?
mustn't you have been timbering?
mustn't they have been timbering?