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