English verb conjugation
MUST CRATER

Regular verb: crater - cratered - cratered

Affirmation

Simple form	V-ing form
I must crater you must crater she must crater we must crater you must crater they must crater	I must be cratering you must be cratering she must be cratering we must be cratering you must be cratering they must be cratering
Perfect	V-ing perfect
I must have cratered you must have cratered she must have cratered we must have cratered you must have cratered they must have cratered	I must have been cratering you must have been cratering she must have been cratering we must have been cratering you must have been cratering they must have been cratering

Negation

Simple form	V-ing form
I mustn't crater you mustn't crater she mustn't crater we mustn't crater you mustn't crater they mustn't crater	I mustn't be cratering you mustn't be cratering she mustn't be cratering we mustn't be cratering you mustn't be cratering they mustn't be cratering
Perfect	V-ing perfect
I mustn't have cratered you mustn't have cratered she mustn't have cratered we mustn't have cratered you mustn't have cratered they mustn't have cratered	I mustn't have been cratering you mustn't have been cratering she mustn't have been cratering we mustn't have been cratering you mustn't have been cratering they mustn't have been cratering

Interrogative form

Simple form	V-ing form
must I crater? must you crater? must she crater? must we crater? must you crater? must they crater?	must I be cratering? must you be cratering? must she be cratering? must we be cratering? must you be cratering? must they be cratering?
Perfect	V-ing perfect
must I have cratered? must you have cratered? must she have cratered? must we have cratered? must you have cratered? must they have cratered?	must I have been cratering? must you have been cratering? must she have been cratering? must we have been cratering? must you have been cratering? must they have been cratering?

Interro-negative form

Simple form	V-ing form
mustn't I crater? mustn't you crater? mustn't she crater? mustn't we crater? mustn't you crater? mustn't they crater?	mustn't I be cratering? mustn't you be cratering? mustn't she be cratering? mustn't we be cratering? mustn't you be cratering? mustn't they be cratering?
Perfect	V-ing perfect
mustn't I have cratered? mustn't you have cratered? mustn't she have cratered? mustn't we have cratered? mustn't you have cratered? mustn't they have cratered?	mustn't I have been cratering? mustn't you have been cratering? mustn't she have been cratering? mustn't we have been cratering? mustn't you have been cratering? mustn't they have been cratering?