English verb conjugation
MUST FOSTER

Regular verb: foster - fostered - fostered

Affirmation

Simple form	V-ing form
I must foster you must foster she must foster we must foster you must foster they must foster	I must be fostering you must be fostering she must be fostering we must be fostering you must be fostering they must be fostering
Perfect	V-ing perfect
I must have fostered you must have fostered she must have fostered we must have fostered you must have fostered they must have fostered	I must have been fostering you must have been fostering she must have been fostering we must have been fostering you must have been fostering they must have been fostering

Negation

Simple form	V-ing form
I mustn't foster you mustn't foster she mustn't foster we mustn't foster you mustn't foster they mustn't foster	I mustn't be fostering you mustn't be fostering she mustn't be fostering we mustn't be fostering you mustn't be fostering they mustn't be fostering
Perfect	V-ing perfect
I mustn't have fostered you mustn't have fostered she mustn't have fostered we mustn't have fostered you mustn't have fostered they mustn't have fostered	I mustn't have been fostering you mustn't have been fostering she mustn't have been fostering we mustn't have been fostering you mustn't have been fostering they mustn't have been fostering

Interrogative form

Simple form	V-ing form
must I foster? must you foster? must she foster? must we foster? must you foster? must they foster?	must I be fostering? must you be fostering? must she be fostering? must we be fostering? must you be fostering? must they be fostering?
Perfect	V-ing perfect
must I have fostered? must you have fostered? must she have fostered? must we have fostered? must you have fostered? must they have fostered?	must I have been fostering? must you have been fostering? must she have been fostering? must we have been fostering? must you have been fostering? must they have been fostering?

Interro-negative form

Simple form	V-ing form
mustn't I foster? mustn't you foster? mustn't she foster? mustn't we foster? mustn't you foster? mustn't they foster?	mustn't I be fostering? mustn't you be fostering? mustn't she be fostering? mustn't we be fostering? mustn't you be fostering? mustn't they be fostering?
Perfect	V-ing perfect
mustn't I have fostered? mustn't you have fostered? mustn't she have fostered? mustn't we have fostered? mustn't you have fostered? mustn't they have fostered?	mustn't I have been fostering? mustn't you have been fostering? mustn't she have been fostering? mustn't we have been fostering? mustn't you have been fostering? mustn't they have been fostering?