Conjugación del verbo inglés
MUST FRET

Verbo regular: fret - fretted - fretted

Afirmación

Forma simple	Forma con V-ing
I must fret you must fret she must fret we must fret you must fret they must fret	I must be fretting you must be fretting she must be fretting we must be fretting you must be fretting they must be fretting
Perfecto	Perfecto con V-ing
I must have fretted you must have fretted she must have fretted we must have fretted you must have fretted they must have fretted	I must have been fretting you must have been fretting she must have been fretting we must have been fretting you must have been fretting they must have been fretting

Negación

Forma simple	Forma con V-ing
I must not fret you must not fret she must not fret we must not fret you must not fret they must not fret	I must not be fretting you must not be fretting she must not be fretting we must not be fretting you must not be fretting they must not be fretting
Perfecto	Perfecto con V-ing
I must not have fretted you must not have fretted she must not have fretted we must not have fretted you must not have fretted they must not have fretted	I must not have been fretting you must not have been fretting she must not have been fretting we must not have been fretting you must not have been fretting they must not have been fretting

Forma interrogativa

Forma simple	Forma con V-ing
must I fret? must you fret? must she fret? must we fret? must you fret? must they fret?	must I be fretting? must you be fretting? must she be fretting? must we be fretting? must you be fretting? must they be fretting?
Perfecto	Perfecto con V-ing
must I have fretted? must you have fretted? must she have fretted? must we have fretted? must you have fretted? must they have fretted?	must I have been fretting? must you have been fretting? must she have been fretting? must we have been fretting? must you have been fretting? must they have been fretting?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not fret? must you not fret? must she not fret? must we not fret? must you not fret? must they not fret?	must I not be fretting? must you not be fretting? must she not be fretting? must we not be fretting? must you not be fretting? must they not be fretting?
Perfecto	Perfecto con V-ing
must I not have fretted? must you not have fretted? must she not have fretted? must we not have fretted? must you not have fretted? must they not have fretted?	must I not have been fretting? must you not have been fretting? must she not have been fretting? must we not have been fretting? must you not have been fretting? must they not have been fretting?