must lobby
Regular verb: lobby - lobbied- lobbied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must lobby
you must lobby
he must lobby
we must lobby
you must lobby
they must lobby 	I must be lobbying
you must be lobbying
he must be lobbying
we must be lobbying
you must be lobbying
they must be lobbying	I must have lobbied
you must have lobbied
he must have lobbied
we must have lobbied
you must have lobbied
they must have lobbied	I must have been lobbying
you must have been lobbying
he must have been lobbying
we must have been lobbying
you must have been lobbying
they must have been lobbying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't lobby
you mustn't lobby
he mustn't lobby
we mustn't lobby
you mustn't lobby
they mustn't lobby 	I mustn't be lobbying
you mustn't be lobbying
he mustn't be lobbying
we mustn't be lobbying
you mustn't be lobbying
they mustn't be lobbying	I mustn't have lobbied
you mustn't have lobbied
he mustn't have lobbied
we mustn't have lobbied
you mustn't have lobbied
they mustn't have lobbied	I mustn't have been lobbying
you mustn't have been lobbying
he mustn't have been lobbying
we mustn't have been lobbying
you mustn't have been lobbying
they mustn't have been lobbying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I lobby?
must you lobby?
must he lobby?
must we lobby?
must you lobby?
must they lobby? 	must I be lobbying?
must you be lobbying?
must he be lobbying?
must we be lobbying?
must you be lobbying?
must they be lobbying? 	must I have lobbied?
must you have lobbied?
must he have lobbied?
must we have lobbied?
must you have lobbied?
must they have lobbied? 	must I have been lobbying?
must you have been lobbying?
must he have been lobbying?
must we have been lobbying?
must you have been lobbying?
must they have been lobbying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I lobby?
mustn't you lobby?
mustn't he lobby?
mustn't we lobby?
mustn't you lobby?
mustn't they lobby? 	mustn't I be lobbying?
mustn't you be lobbying?
mustn't he be lobbying?
mustn't we be lobbying?
mustn't you be lobbying?
mustn't they be lobbying? 	mustn't I have lobbied?
mustn't you have lobbied?
mustn't he have lobbied?
mustn't we have lobbied?
mustn't you have lobbied?
mustn't they have lobbied? 	mustn't I have been lobbying?
mustn't you have been lobbying?
mustn't he have been lobbying?
mustn't we have been lobbying?
mustn't you have been lobbying?
mustn't they have been lobbying?