Conjugación del verbo inglés
MUST SING

Verbo irregular: sing - sang - sung

Afirmación

Forma simple	Forma con V-ing
I must sing you must sing she must sing we must sing you must sing they must sing	I must be singing you must be singing she must be singing we must be singing you must be singing they must be singing
Perfecto	Perfecto con V-ing
I must have sung you must have sung she must have sung we must have sung you must have sung they must have sung	I must have been singing you must have been singing she must have been singing we must have been singing you must have been singing they must have been singing

Negación

Forma simple	Forma con V-ing
I mustn't sing you mustn't sing she mustn't sing we mustn't sing you mustn't sing they mustn't sing	I mustn't be singing you mustn't be singing she mustn't be singing we mustn't be singing you mustn't be singing they mustn't be singing
Perfecto	Perfecto con V-ing
I mustn't have sung you mustn't have sung she mustn't have sung we mustn't have sung you mustn't have sung they mustn't have sung	I mustn't have been singing you mustn't have been singing she mustn't have been singing we mustn't have been singing you mustn't have been singing they mustn't have been singing

Forma interrogativa

Forma simple	Forma con V-ing
must I sing? must you sing? must she sing? must we sing? must you sing? must they sing?	must I be singing? must you be singing? must she be singing? must we be singing? must you be singing? must they be singing?
Perfecto	Perfecto con V-ing
must I have sung? must you have sung? must she have sung? must we have sung? must you have sung? must they have sung?	must I have been singing? must you have been singing? must she have been singing? must we have been singing? must you have been singing? must they have been singing?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I sing? mustn't you sing? mustn't she sing? mustn't we sing? mustn't you sing? mustn't they sing?	mustn't I be singing? mustn't you be singing? mustn't she be singing? mustn't we be singing? mustn't you be singing? mustn't they be singing?
Perfecto	Perfecto con V-ing
mustn't I have sung? mustn't you have sung? mustn't she have sung? mustn't we have sung? mustn't you have sung? mustn't they have sung?	mustn't I have been singing? mustn't you have been singing? mustn't she have been singing? mustn't we have been singing? mustn't you have been singing? mustn't they have been singing?