I must sparkle you must sparkle she must sparkle we must sparkle you must sparkle they must sparkle
V-ing form
I must be sparkling you must be sparkling she must be sparkling we must be sparkling you must be sparkling they must be sparkling
Perfect
I must have sparkled you must have sparkled she must have sparkled we must have sparkled you must have sparkled they must have sparkled
V-ing perfect
I must have been sparkling you must have been sparkling she must have been sparkling we must have been sparkling you must have been sparkling they must have been sparkling
Negation
Simple form
I mustn't sparkle you mustn't sparkle she mustn't sparkle we mustn't sparkle you mustn't sparkle they mustn't sparkle
V-ing form
I mustn't be sparkling you mustn't be sparkling she mustn't be sparkling we mustn't be sparkling you mustn't be sparkling they mustn't be sparkling
Perfect
I mustn't have sparkled you mustn't have sparkled she mustn't have sparkled we mustn't have sparkled you mustn't have sparkled they mustn't have sparkled
V-ing perfect
I mustn't have been sparkling you mustn't have been sparkling she mustn't have been sparkling we mustn't have been sparkling you mustn't have been sparkling they mustn't have been sparkling
Interrogative form
Simple form
must I sparkle? must you sparkle? must she sparkle? must we sparkle? must you sparkle? must they sparkle?
V-ing form
must I be sparkling? must you be sparkling? must she be sparkling? must we be sparkling? must you be sparkling? must they be sparkling?
Perfect
must I have sparkled? must you have sparkled? must she have sparkled? must we have sparkled? must you have sparkled? must they have sparkled?
V-ing perfect
must I have been sparkling? must you have been sparkling? must she have been sparkling? must we have been sparkling? must you have been sparkling? must they have been sparkling?
Interro-negative form
Simple form
mustn't I sparkle? mustn't you sparkle? mustn't she sparkle? mustn't we sparkle? mustn't you sparkle? mustn't they sparkle?
V-ing form
mustn't I be sparkling? mustn't you be sparkling? mustn't she be sparkling? mustn't we be sparkling? mustn't you be sparkling? mustn't they be sparkling?
Perfect
mustn't I have sparkled? mustn't you have sparkled? mustn't she have sparkled? mustn't we have sparkled? mustn't you have sparkled? mustn't they have sparkled?
V-ing perfect
mustn't I have been sparkling? mustn't you have been sparkling? mustn't she have been sparkling? mustn't we have been sparkling? mustn't you have been sparkling? mustn't they have been sparkling?