I must hop you must hop he must hop we must hop you must hop they must hop
V-ing form
I must be hopping you must be hopping he must be hopping we must be hopping you must be hopping they must be hopping
Perfect
I must have hopped you must have hopped he must have hopped we must have hopped you must have hopped they must have hopped
V-ing perfect
I must have been hopping you must have been hopping he must have been hopping we must have been hopping you must have been hopping they must have been hopping
Negation
Simple form
I mustn't hop you mustn't hop he mustn't hop we mustn't hop you mustn't hop they mustn't hop
V-ing form
I mustn't be hopping you mustn't be hopping he mustn't be hopping we mustn't be hopping you mustn't be hopping they mustn't be hopping
Perfect
I mustn't have hopped you mustn't have hopped he mustn't have hopped we mustn't have hopped you mustn't have hopped they mustn't have hopped
V-ing perfect
I mustn't have been hopping you mustn't have been hopping he mustn't have been hopping we mustn't have been hopping you mustn't have been hopping they mustn't have been hopping
Interrogative form
Simple form
must I hop? must you hop? must he hop? must we hop? must you hop? must they hop?
V-ing form
must I be hopping? must you be hopping? must he be hopping? must we be hopping? must you be hopping? must they be hopping?
Perfect
must I have hopped? must you have hopped? must he have hopped? must we have hopped? must you have hopped? must they have hopped?
V-ing perfect
must I have been hopping? must you have been hopping? must he have been hopping? must we have been hopping? must you have been hopping? must they have been hopping?
Interro-negative form
Simple form
mustn't I hop? mustn't you hop? mustn't he hop? mustn't we hop? mustn't you hop? mustn't they hop?
V-ing form
mustn't I be hopping? mustn't you be hopping? mustn't he be hopping? mustn't we be hopping? mustn't you be hopping? mustn't they be hopping?
Perfect
mustn't I have hopped? mustn't you have hopped? mustn't he have hopped? mustn't we have hopped? mustn't you have hopped? mustn't they have hopped?
V-ing perfect
mustn't I have been hopping? mustn't you have been hopping? mustn't he have been hopping? mustn't we have been hopping? mustn't you have been hopping? mustn't they have been hopping?