must switchback
Verbe régulier : switchback - switchbacked- switchbacked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must switchback
you must switchback
she must switchback
we must switchback
you must switchback
they must switchback 	I must be switchbacking
you must be switchbacking
she must be switchbacking
we must be switchbacking
you must be switchbacking
they must be switchbacking	I must have switchbacked
you must have switchbacked
she must have switchbacked
we must have switchbacked
you must have switchbacked
they must have switchbacked	I must have been switchbacking
you must have been switchbacking
she must have been switchbacking
we must have been switchbacking
you must have been switchbacking
they must have been switchbacking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't switchback
you mustn't switchback
she mustn't switchback
we mustn't switchback
you mustn't switchback
they mustn't switchback 	I mustn't be switchbacking
you mustn't be switchbacking
she mustn't be switchbacking
we mustn't be switchbacking
you mustn't be switchbacking
they mustn't be switchbacking	I mustn't have switchbacked
you mustn't have switchbacked
she mustn't have switchbacked
we mustn't have switchbacked
you mustn't have switchbacked
they mustn't have switchbacked	I mustn't have been switchbacking
you mustn't have been switchbacking
she mustn't have been switchbacking
we mustn't have been switchbacking
you mustn't have been switchbacking
they mustn't have been switchbacking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I switchback?
must you switchback?
must she switchback?
must we switchback?
must you switchback?
must they switchback? 	must I be switchbacking?
must you be switchbacking?
must she be switchbacking?
must we be switchbacking?
must you be switchbacking?
must they be switchbacking? 	must I have switchbacked?
must you have switchbacked?
must she have switchbacked?
must we have switchbacked?
must you have switchbacked?
must they have switchbacked? 	must I have been switchbacking?
must you have been switchbacking?
must she have been switchbacking?
must we have been switchbacking?
must you have been switchbacking?
must they have been switchbacking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I switchback?
mustn't you switchback?
mustn't she switchback?
mustn't we switchback?
mustn't you switchback?
mustn't they switchback? 	mustn't I be switchbacking?
mustn't you be switchbacking?
mustn't she be switchbacking?
mustn't we be switchbacking?
mustn't you be switchbacking?
mustn't they be switchbacking? 	mustn't I have switchbacked?
mustn't you have switchbacked?
mustn't she have switchbacked?
mustn't we have switchbacked?
mustn't you have switchbacked?
mustn't they have switchbacked? 	mustn't I have been switchbacking?
mustn't you have been switchbacking?
mustn't she have been switchbacking?
mustn't we have been switchbacking?
mustn't you have been switchbacking?
mustn't they have been switchbacking?