English verb conjugation
MUST CHOIR

Regular verb: choir - choired - choired

Affirmation

Simple form	V-ing form
I must choir you must choir she must choir we must choir you must choir they must choir	I must be choiring you must be choiring she must be choiring we must be choiring you must be choiring they must be choiring
Perfect	V-ing perfect
I must have choired you must have choired she must have choired we must have choired you must have choired they must have choired	I must have been choiring you must have been choiring she must have been choiring we must have been choiring you must have been choiring they must have been choiring

Negation

Simple form	V-ing form
I mustn't choir you mustn't choir she mustn't choir we mustn't choir you mustn't choir they mustn't choir	I mustn't be choiring you mustn't be choiring she mustn't be choiring we mustn't be choiring you mustn't be choiring they mustn't be choiring
Perfect	V-ing perfect
I mustn't have choired you mustn't have choired she mustn't have choired we mustn't have choired you mustn't have choired they mustn't have choired	I mustn't have been choiring you mustn't have been choiring she mustn't have been choiring we mustn't have been choiring you mustn't have been choiring they mustn't have been choiring

Interrogative form

Simple form	V-ing form
must I choir? must you choir? must she choir? must we choir? must you choir? must they choir?	must I be choiring? must you be choiring? must she be choiring? must we be choiring? must you be choiring? must they be choiring?
Perfect	V-ing perfect
must I have choired? must you have choired? must she have choired? must we have choired? must you have choired? must they have choired?	must I have been choiring? must you have been choiring? must she have been choiring? must we have been choiring? must you have been choiring? must they have been choiring?

Interro-negative form

Simple form	V-ing form
mustn't I choir? mustn't you choir? mustn't she choir? mustn't we choir? mustn't you choir? mustn't they choir?	mustn't I be choiring? mustn't you be choiring? mustn't she be choiring? mustn't we be choiring? mustn't you be choiring? mustn't they be choiring?
Perfect	V-ing perfect
mustn't I have choired? mustn't you have choired? mustn't she have choired? mustn't we have choired? mustn't you have choired? mustn't they have choired?	mustn't I have been choiring? mustn't you have been choiring? mustn't she have been choiring? mustn't we have been choiring? mustn't you have been choiring? mustn't they have been choiring?