English verb conjugation
MUST FORECAST

Irregular verb: forecast - forecast - forecast

Affirmation

Simple form	V-ing form
I must forecast you must forecast she must forecast we must forecast you must forecast they must forecast	I must be forecasting you must be forecasting she must be forecasting we must be forecasting you must be forecasting they must be forecasting
Perfect	V-ing perfect
I must have forecast you must have forecast she must have forecast we must have forecast you must have forecast they must have forecast	I must have been forecasting you must have been forecasting she must have been forecasting we must have been forecasting you must have been forecasting they must have been forecasting

Negation

Simple form	V-ing form
I mustn't forecast you mustn't forecast she mustn't forecast we mustn't forecast you mustn't forecast they mustn't forecast	I mustn't be forecasting you mustn't be forecasting she mustn't be forecasting we mustn't be forecasting you mustn't be forecasting they mustn't be forecasting
Perfect	V-ing perfect
I mustn't have forecast you mustn't have forecast she mustn't have forecast we mustn't have forecast you mustn't have forecast they mustn't have forecast	I mustn't have been forecasting you mustn't have been forecasting she mustn't have been forecasting we mustn't have been forecasting you mustn't have been forecasting they mustn't have been forecasting

Interrogative form

Simple form	V-ing form
must I forecast? must you forecast? must she forecast? must we forecast? must you forecast? must they forecast?	must I be forecasting? must you be forecasting? must she be forecasting? must we be forecasting? must you be forecasting? must they be forecasting?
Perfect	V-ing perfect
must I have forecast? must you have forecast? must she have forecast? must we have forecast? must you have forecast? must they have forecast?	must I have been forecasting? must you have been forecasting? must she have been forecasting? must we have been forecasting? must you have been forecasting? must they have been forecasting?

Interro-negative form

Simple form	V-ing form
mustn't I forecast? mustn't you forecast? mustn't she forecast? mustn't we forecast? mustn't you forecast? mustn't they forecast?	mustn't I be forecasting? mustn't you be forecasting? mustn't she be forecasting? mustn't we be forecasting? mustn't you be forecasting? mustn't they be forecasting?
Perfect	V-ing perfect
mustn't I have forecast? mustn't you have forecast? mustn't she have forecast? mustn't we have forecast? mustn't you have forecast? mustn't they have forecast?	mustn't I have been forecasting? mustn't you have been forecasting? mustn't she have been forecasting? mustn't we have been forecasting? mustn't you have been forecasting? mustn't they have been forecasting?