English verb conjugation
MUST SPECK

Regular verb: speck - specked - specked

Affirmation

Simple form	V-ing form
I must speck you must speck she must speck we must speck you must speck they must speck	I must be specking you must be specking she must be specking we must be specking you must be specking they must be specking
Perfect	V-ing perfect
I must have specked you must have specked she must have specked we must have specked you must have specked they must have specked	I must have been specking you must have been specking she must have been specking we must have been specking you must have been specking they must have been specking

Negation

Simple form	V-ing form
I mustn't speck you mustn't speck she mustn't speck we mustn't speck you mustn't speck they mustn't speck	I mustn't be specking you mustn't be specking she mustn't be specking we mustn't be specking you mustn't be specking they mustn't be specking
Perfect	V-ing perfect
I mustn't have specked you mustn't have specked she mustn't have specked we mustn't have specked you mustn't have specked they mustn't have specked	I mustn't have been specking you mustn't have been specking she mustn't have been specking we mustn't have been specking you mustn't have been specking they mustn't have been specking

Interrogative form

Simple form	V-ing form
must I speck? must you speck? must she speck? must we speck? must you speck? must they speck?	must I be specking? must you be specking? must she be specking? must we be specking? must you be specking? must they be specking?
Perfect	V-ing perfect
must I have specked? must you have specked? must she have specked? must we have specked? must you have specked? must they have specked?	must I have been specking? must you have been specking? must she have been specking? must we have been specking? must you have been specking? must they have been specking?

Interro-negative form

Simple form	V-ing form
mustn't I speck? mustn't you speck? mustn't she speck? mustn't we speck? mustn't you speck? mustn't they speck?	mustn't I be specking? mustn't you be specking? mustn't she be specking? mustn't we be specking? mustn't you be specking? mustn't they be specking?
Perfect	V-ing perfect
mustn't I have specked? mustn't you have specked? mustn't she have specked? mustn't we have specked? mustn't you have specked? mustn't they have specked?	mustn't I have been specking? mustn't you have been specking? mustn't she have been specking? mustn't we have been specking? mustn't you have been specking? mustn't they have been specking?