English verb conjugation
MUST PLOUGH

Regular verb: plough - ploughed - ploughed

Affirmation

Simple form	V-ing form
I must plough you must plough she must plough we must plough you must plough they must plough	I must be ploughing you must be ploughing she must be ploughing we must be ploughing you must be ploughing they must be ploughing
Perfect	V-ing perfect
I must have ploughed you must have ploughed she must have ploughed we must have ploughed you must have ploughed they must have ploughed	I must have been ploughing you must have been ploughing she must have been ploughing we must have been ploughing you must have been ploughing they must have been ploughing

Negation

Simple form	V-ing form
I mustn't plough you mustn't plough she mustn't plough we mustn't plough you mustn't plough they mustn't plough	I mustn't be ploughing you mustn't be ploughing she mustn't be ploughing we mustn't be ploughing you mustn't be ploughing they mustn't be ploughing
Perfect	V-ing perfect
I mustn't have ploughed you mustn't have ploughed she mustn't have ploughed we mustn't have ploughed you mustn't have ploughed they mustn't have ploughed	I mustn't have been ploughing you mustn't have been ploughing she mustn't have been ploughing we mustn't have been ploughing you mustn't have been ploughing they mustn't have been ploughing

Interrogative form

Simple form	V-ing form
must I plough? must you plough? must she plough? must we plough? must you plough? must they plough?	must I be ploughing? must you be ploughing? must she be ploughing? must we be ploughing? must you be ploughing? must they be ploughing?
Perfect	V-ing perfect
must I have ploughed? must you have ploughed? must she have ploughed? must we have ploughed? must you have ploughed? must they have ploughed?	must I have been ploughing? must you have been ploughing? must she have been ploughing? must we have been ploughing? must you have been ploughing? must they have been ploughing?

Interro-negative form

Simple form	V-ing form
mustn't I plough? mustn't you plough? mustn't she plough? mustn't we plough? mustn't you plough? mustn't they plough?	mustn't I be ploughing? mustn't you be ploughing? mustn't she be ploughing? mustn't we be ploughing? mustn't you be ploughing? mustn't they be ploughing?
Perfect	V-ing perfect
mustn't I have ploughed? mustn't you have ploughed? mustn't she have ploughed? mustn't we have ploughed? mustn't you have ploughed? mustn't they have ploughed?	mustn't I have been ploughing? mustn't you have been ploughing? mustn't she have been ploughing? mustn't we have been ploughing? mustn't you have been ploughing? mustn't they have been ploughing?