English verb conjugation
MUST GAMBLE

Regular verb: gamble - gambled - gambled

Affirmation

Simple form	V-ing form
I must gamble you must gamble he must gamble we must gamble you must gamble they must gamble	I must be gambling you must be gambling he must be gambling we must be gambling you must be gambling they must be gambling
Perfect	V-ing perfect
I must have gambled you must have gambled he must have gambled we must have gambled you must have gambled they must have gambled	I must have been gambling you must have been gambling he must have been gambling we must have been gambling you must have been gambling they must have been gambling

Negation

Simple form	V-ing form
I mustn't gamble you mustn't gamble he mustn't gamble we mustn't gamble you mustn't gamble they mustn't gamble	I mustn't be gambling you mustn't be gambling he mustn't be gambling we mustn't be gambling you mustn't be gambling they mustn't be gambling
Perfect	V-ing perfect
I mustn't have gambled you mustn't have gambled he mustn't have gambled we mustn't have gambled you mustn't have gambled they mustn't have gambled	I mustn't have been gambling you mustn't have been gambling he mustn't have been gambling we mustn't have been gambling you mustn't have been gambling they mustn't have been gambling

Interrogative form

Simple form	V-ing form
must I gamble? must you gamble? must he gamble? must we gamble? must you gamble? must they gamble?	must I be gambling? must you be gambling? must he be gambling? must we be gambling? must you be gambling? must they be gambling?
Perfect	V-ing perfect
must I have gambled? must you have gambled? must he have gambled? must we have gambled? must you have gambled? must they have gambled?	must I have been gambling? must you have been gambling? must he have been gambling? must we have been gambling? must you have been gambling? must they have been gambling?

Interro-negative form

Simple form	V-ing form
mustn't I gamble? mustn't you gamble? mustn't he gamble? mustn't we gamble? mustn't you gamble? mustn't they gamble?	mustn't I be gambling? mustn't you be gambling? mustn't he be gambling? mustn't we be gambling? mustn't you be gambling? mustn't they be gambling?
Perfect	V-ing perfect
mustn't I have gambled? mustn't you have gambled? mustn't he have gambled? mustn't we have gambled? mustn't you have gambled? mustn't they have gambled?	mustn't I have been gambling? mustn't you have been gambling? mustn't he have been gambling? mustn't we have been gambling? mustn't you have been gambling? mustn't they have been gambling?