English verb conjugation
MUST THATCH

Regular verb: thatch - thatched - thatched

Affirmation

Simple form	V-ing form
I must thatch you must thatch he must thatch we must thatch you must thatch they must thatch	I must be thatching you must be thatching he must be thatching we must be thatching you must be thatching they must be thatching
Perfect	V-ing perfect
I must have thatched you must have thatched he must have thatched we must have thatched you must have thatched they must have thatched	I must have been thatching you must have been thatching he must have been thatching we must have been thatching you must have been thatching they must have been thatching

Negation

Simple form	V-ing form
I must not thatch you must not thatch he must not thatch we must not thatch you must not thatch they must not thatch	I must not be thatching you must not be thatching he must not be thatching we must not be thatching you must not be thatching they must not be thatching
Perfect	V-ing perfect
I must not have thatched you must not have thatched he must not have thatched we must not have thatched you must not have thatched they must not have thatched	I must not have been thatching you must not have been thatching he must not have been thatching we must not have been thatching you must not have been thatching they must not have been thatching

Interrogative form

Simple form	V-ing form
must I thatch? must you thatch? must he thatch? must we thatch? must you thatch? must they thatch?	must I be thatching? must you be thatching? must he be thatching? must we be thatching? must you be thatching? must they be thatching?
Perfect	V-ing perfect
must I have thatched? must you have thatched? must he have thatched? must we have thatched? must you have thatched? must they have thatched?	must I have been thatching? must you have been thatching? must he have been thatching? must we have been thatching? must you have been thatching? must they have been thatching?

Interro-negative form

Simple form	V-ing form
must I not thatch? must you not thatch? must he not thatch? must we not thatch? must you not thatch? must they not thatch?	must I not be thatching? must you not be thatching? must he not be thatching? must we not be thatching? must you not be thatching? must they not be thatching?
Perfect	V-ing perfect
must I not have thatched? must you not have thatched? must he not have thatched? must we not have thatched? must you not have thatched? must they not have thatched?	must I not have been thatching? must you not have been thatching? must he not have been thatching? must we not have been thatching? must you not have been thatching? must they not have been thatching?