English verb conjugation
MUST THRESH

Regular verb: thresh - threshed - threshed

Affirmation

Simple form	V-ing form
I must thresh you must thresh he must thresh we must thresh you must thresh they must thresh	I must be threshing you must be threshing he must be threshing we must be threshing you must be threshing they must be threshing
Perfect	V-ing perfect
I must have threshed you must have threshed he must have threshed we must have threshed you must have threshed they must have threshed	I must have been threshing you must have been threshing he must have been threshing we must have been threshing you must have been threshing they must have been threshing

Negation

Simple form	V-ing form
I must not thresh you must not thresh he must not thresh we must not thresh you must not thresh they must not thresh	I must not be threshing you must not be threshing he must not be threshing we must not be threshing you must not be threshing they must not be threshing
Perfect	V-ing perfect
I must not have threshed you must not have threshed he must not have threshed we must not have threshed you must not have threshed they must not have threshed	I must not have been threshing you must not have been threshing he must not have been threshing we must not have been threshing you must not have been threshing they must not have been threshing

Interrogative form

Simple form	V-ing form
must I thresh? must you thresh? must he thresh? must we thresh? must you thresh? must they thresh?	must I be threshing? must you be threshing? must he be threshing? must we be threshing? must you be threshing? must they be threshing?
Perfect	V-ing perfect
must I have threshed? must you have threshed? must he have threshed? must we have threshed? must you have threshed? must they have threshed?	must I have been threshing? must you have been threshing? must he have been threshing? must we have been threshing? must you have been threshing? must they have been threshing?

Interro-negative form

Simple form	V-ing form
must I not thresh? must you not thresh? must he not thresh? must we not thresh? must you not thresh? must they not thresh?	must I not be threshing? must you not be threshing? must he not be threshing? must we not be threshing? must you not be threshing? must they not be threshing?
Perfect	V-ing perfect
must I not have threshed? must you not have threshed? must he not have threshed? must we not have threshed? must you not have threshed? must they not have threshed?	must I not have been threshing? must you not have been threshing? must he not have been threshing? must we not have been threshing? must you not have been threshing? must they not have been threshing?