English verb conjugation
MUST SPIEL

Regular verb: spiel - spieled - spieled

Affirmation

Simple form	V-ing form
I must spiel you must spiel she must spiel we must spiel you must spiel they must spiel	I must be spieling you must be spieling she must be spieling we must be spieling you must be spieling they must be spieling
Perfect	V-ing perfect
I must have spieled you must have spieled she must have spieled we must have spieled you must have spieled they must have spieled	I must have been spieling you must have been spieling she must have been spieling we must have been spieling you must have been spieling they must have been spieling

Negation

Simple form	V-ing form
I mustn't spiel you mustn't spiel she mustn't spiel we mustn't spiel you mustn't spiel they mustn't spiel	I mustn't be spieling you mustn't be spieling she mustn't be spieling we mustn't be spieling you mustn't be spieling they mustn't be spieling
Perfect	V-ing perfect
I mustn't have spieled you mustn't have spieled she mustn't have spieled we mustn't have spieled you mustn't have spieled they mustn't have spieled	I mustn't have been spieling you mustn't have been spieling she mustn't have been spieling we mustn't have been spieling you mustn't have been spieling they mustn't have been spieling

Interrogative form

Simple form	V-ing form
must I spiel? must you spiel? must she spiel? must we spiel? must you spiel? must they spiel?	must I be spieling? must you be spieling? must she be spieling? must we be spieling? must you be spieling? must they be spieling?
Perfect	V-ing perfect
must I have spieled? must you have spieled? must she have spieled? must we have spieled? must you have spieled? must they have spieled?	must I have been spieling? must you have been spieling? must she have been spieling? must we have been spieling? must you have been spieling? must they have been spieling?

Interro-negative form

Simple form	V-ing form
mustn't I spiel? mustn't you spiel? mustn't she spiel? mustn't we spiel? mustn't you spiel? mustn't they spiel?	mustn't I be spieling? mustn't you be spieling? mustn't she be spieling? mustn't we be spieling? mustn't you be spieling? mustn't they be spieling?
Perfect	V-ing perfect
mustn't I have spieled? mustn't you have spieled? mustn't she have spieled? mustn't we have spieled? mustn't you have spieled? mustn't they have spieled?	mustn't I have been spieling? mustn't you have been spieling? mustn't she have been spieling? mustn't we have been spieling? mustn't you have been spieling? mustn't they have been spieling?