must waste
Regular verb: waste - wasted- wasted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must waste
you must waste
he must waste
we must waste
you must waste
they must waste 	I must be wasting
you must be wasting
he must be wasting
we must be wasting
you must be wasting
they must be wasting	I must have wasted
you must have wasted
he must have wasted
we must have wasted
you must have wasted
they must have wasted	I must have been wasting
you must have been wasting
he must have been wasting
we must have been wasting
you must have been wasting
they must have been wasting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't waste
you mustn't waste
he mustn't waste
we mustn't waste
you mustn't waste
they mustn't waste 	I mustn't be wasting
you mustn't be wasting
he mustn't be wasting
we mustn't be wasting
you mustn't be wasting
they mustn't be wasting	I mustn't have wasted
you mustn't have wasted
he mustn't have wasted
we mustn't have wasted
you mustn't have wasted
they mustn't have wasted	I mustn't have been wasting
you mustn't have been wasting
he mustn't have been wasting
we mustn't have been wasting
you mustn't have been wasting
they mustn't have been wasting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I waste?
must you waste?
must he waste?
must we waste?
must you waste?
must they waste? 	must I be wasting?
must you be wasting?
must he be wasting?
must we be wasting?
must you be wasting?
must they be wasting? 	must I have wasted?
must you have wasted?
must he have wasted?
must we have wasted?
must you have wasted?
must they have wasted? 	must I have been wasting?
must you have been wasting?
must he have been wasting?
must we have been wasting?
must you have been wasting?
must they have been wasting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I waste?
mustn't you waste?
mustn't he waste?
mustn't we waste?
mustn't you waste?
mustn't they waste? 	mustn't I be wasting?
mustn't you be wasting?
mustn't he be wasting?
mustn't we be wasting?
mustn't you be wasting?
mustn't they be wasting? 	mustn't I have wasted?
mustn't you have wasted?
mustn't he have wasted?
mustn't we have wasted?
mustn't you have wasted?
mustn't they have wasted? 	mustn't I have been wasting?
mustn't you have been wasting?
mustn't he have been wasting?
mustn't we have been wasting?
mustn't you have been wasting?
mustn't they have been wasting?