I must sparkle you must sparkle he must sparkle we must sparkle you must sparkle they must sparkle
V-ing form
I must be sparkling you must be sparkling he must be sparkling we must be sparkling you must be sparkling they must be sparkling
Perfect
I must have sparkled you must have sparkled he 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 he must have been sparkling we must have been sparkling you must have been sparkling they must have been sparkling
Negation
Simple form
I must not sparkle you must not sparkle he must not sparkle we must not sparkle you must not sparkle they must not sparkle
V-ing form
I must not be sparkling you must not be sparkling he must not be sparkling we must not be sparkling you must not be sparkling they must not be sparkling
Perfect
I must not have sparkled you must not have sparkled he must not have sparkled we must not have sparkled you must not have sparkled they must not have sparkled
V-ing perfect
I must not have been sparkling you must not have been sparkling he must not have been sparkling we must not have been sparkling you must not have been sparkling they must not have been sparkling
Interrogative form
Simple form
must I sparkle? must you sparkle? must he sparkle? must we sparkle? must you sparkle? must they sparkle?
V-ing form
must I be sparkling? must you be sparkling? must he be sparkling? must we be sparkling? must you be sparkling? must they be sparkling?
Perfect
must I have sparkled? must you have sparkled? must he 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 he have been sparkling? must we have been sparkling? must you have been sparkling? must they have been sparkling?
Interro-negative form
Simple form
must I not sparkle? must you not sparkle? must he not sparkle? must we not sparkle? must you not sparkle? must they not sparkle?
V-ing form
must I not be sparkling? must you not be sparkling? must he not be sparkling? must we not be sparkling? must you not be sparkling? must they not be sparkling?
Perfect
must I not have sparkled? must you not have sparkled? must he not have sparkled? must we not have sparkled? must you not have sparkled? must they not have sparkled?
V-ing perfect
must I not have been sparkling? must you not have been sparkling? must he not have been sparkling? must we not have been sparkling? must you not have been sparkling? must they not have been sparkling?