must devastate
Regular verb: devastate - devastated- devastated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must devastate
you must devastate
she must devastate
we must devastate
you must devastate
they must devastate 	I must be devastating
you must be devastating
she must be devastating
we must be devastating
you must be devastating
they must be devastating	I must have devastated
you must have devastated
she must have devastated
we must have devastated
you must have devastated
they must have devastated	I must have been devastating
you must have been devastating
she must have been devastating
we must have been devastating
you must have been devastating
they must have been devastating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't devastate
you mustn't devastate
she mustn't devastate
we mustn't devastate
you mustn't devastate
they mustn't devastate 	I mustn't be devastating
you mustn't be devastating
she mustn't be devastating
we mustn't be devastating
you mustn't be devastating
they mustn't be devastating	I mustn't have devastated
you mustn't have devastated
she mustn't have devastated
we mustn't have devastated
you mustn't have devastated
they mustn't have devastated	I mustn't have been devastating
you mustn't have been devastating
she mustn't have been devastating
we mustn't have been devastating
you mustn't have been devastating
they mustn't have been devastating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I devastate?
must you devastate?
must she devastate?
must we devastate?
must you devastate?
must they devastate? 	must I be devastating?
must you be devastating?
must she be devastating?
must we be devastating?
must you be devastating?
must they be devastating? 	must I have devastated?
must you have devastated?
must she have devastated?
must we have devastated?
must you have devastated?
must they have devastated? 	must I have been devastating?
must you have been devastating?
must she have been devastating?
must we have been devastating?
must you have been devastating?
must they have been devastating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I devastate?
mustn't you devastate?
mustn't she devastate?
mustn't we devastate?
mustn't you devastate?
mustn't they devastate? 	mustn't I be devastating?
mustn't you be devastating?
mustn't she be devastating?
mustn't we be devastating?
mustn't you be devastating?
mustn't they be devastating? 	mustn't I have devastated?
mustn't you have devastated?
mustn't she have devastated?
mustn't we have devastated?
mustn't you have devastated?
mustn't they have devastated? 	mustn't I have been devastating?
mustn't you have been devastating?
mustn't she have been devastating?
mustn't we have been devastating?
mustn't you have been devastating?
mustn't they have been devastating?