must morph
Regular verb: morph - morphed- morphed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must morph
you must morph
she must morph
we must morph
you must morph
they must morph 	I must be morphing
you must be morphing
she must be morphing
we must be morphing
you must be morphing
they must be morphing	I must have morphed
you must have morphed
she must have morphed
we must have morphed
you must have morphed
they must have morphed	I must have been morphing
you must have been morphing
she must have been morphing
we must have been morphing
you must have been morphing
they must have been morphing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't morph
you mustn't morph
she mustn't morph
we mustn't morph
you mustn't morph
they mustn't morph 	I mustn't be morphing
you mustn't be morphing
she mustn't be morphing
we mustn't be morphing
you mustn't be morphing
they mustn't be morphing	I mustn't have morphed
you mustn't have morphed
she mustn't have morphed
we mustn't have morphed
you mustn't have morphed
they mustn't have morphed	I mustn't have been morphing
you mustn't have been morphing
she mustn't have been morphing
we mustn't have been morphing
you mustn't have been morphing
they mustn't have been morphing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I morph?
must you morph?
must she morph?
must we morph?
must you morph?
must they morph? 	must I be morphing?
must you be morphing?
must she be morphing?
must we be morphing?
must you be morphing?
must they be morphing? 	must I have morphed?
must you have morphed?
must she have morphed?
must we have morphed?
must you have morphed?
must they have morphed? 	must I have been morphing?
must you have been morphing?
must she have been morphing?
must we have been morphing?
must you have been morphing?
must they have been morphing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I morph?
mustn't you morph?
mustn't she morph?
mustn't we morph?
mustn't you morph?
mustn't they morph? 	mustn't I be morphing?
mustn't you be morphing?
mustn't she be morphing?
mustn't we be morphing?
mustn't you be morphing?
mustn't they be morphing? 	mustn't I have morphed?
mustn't you have morphed?
mustn't she have morphed?
mustn't we have morphed?
mustn't you have morphed?
mustn't they have morphed? 	mustn't I have been morphing?
mustn't you have been morphing?
mustn't she have been morphing?
mustn't we have been morphing?
mustn't you have been morphing?
mustn't they have been morphing?