must scuttle
Regular verb: scuttle - scuttled- scuttled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must scuttle
you must scuttle
she must scuttle
we must scuttle
you must scuttle
they must scuttle 	I must be scuttling
you must be scuttling
she must be scuttling
we must be scuttling
you must be scuttling
they must be scuttling	I must have scuttled
you must have scuttled
she must have scuttled
we must have scuttled
you must have scuttled
they must have scuttled	I must have been scuttling
you must have been scuttling
she must have been scuttling
we must have been scuttling
you must have been scuttling
they must have been scuttling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't scuttle
you mustn't scuttle
she mustn't scuttle
we mustn't scuttle
you mustn't scuttle
they mustn't scuttle 	I mustn't be scuttling
you mustn't be scuttling
she mustn't be scuttling
we mustn't be scuttling
you mustn't be scuttling
they mustn't be scuttling	I mustn't have scuttled
you mustn't have scuttled
she mustn't have scuttled
we mustn't have scuttled
you mustn't have scuttled
they mustn't have scuttled	I mustn't have been scuttling
you mustn't have been scuttling
she mustn't have been scuttling
we mustn't have been scuttling
you mustn't have been scuttling
they mustn't have been scuttling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I scuttle?
must you scuttle?
must she scuttle?
must we scuttle?
must you scuttle?
must they scuttle? 	must I be scuttling?
must you be scuttling?
must she be scuttling?
must we be scuttling?
must you be scuttling?
must they be scuttling? 	must I have scuttled?
must you have scuttled?
must she have scuttled?
must we have scuttled?
must you have scuttled?
must they have scuttled? 	must I have been scuttling?
must you have been scuttling?
must she have been scuttling?
must we have been scuttling?
must you have been scuttling?
must they have been scuttling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I scuttle?
mustn't you scuttle?
mustn't she scuttle?
mustn't we scuttle?
mustn't you scuttle?
mustn't they scuttle? 	mustn't I be scuttling?
mustn't you be scuttling?
mustn't she be scuttling?
mustn't we be scuttling?
mustn't you be scuttling?
mustn't they be scuttling? 	mustn't I have scuttled?
mustn't you have scuttled?
mustn't she have scuttled?
mustn't we have scuttled?
mustn't you have scuttled?
mustn't they have scuttled? 	mustn't I have been scuttling?
mustn't you have been scuttling?
mustn't she have been scuttling?
mustn't we have been scuttling?
mustn't you have been scuttling?
mustn't they have been scuttling?