English verb conjugation
MUST TOBOGGAN

Regular verb: toboggan - tobogganed - tobogganed

Affirmation

Simple form	V-ing form
I must toboggan you must toboggan he must toboggan we must toboggan you must toboggan they must toboggan	I must be tobogganing you must be tobogganing he must be tobogganing we must be tobogganing you must be tobogganing they must be tobogganing
Perfect	V-ing perfect
I must have tobogganed you must have tobogganed he must have tobogganed we must have tobogganed you must have tobogganed they must have tobogganed	I must have been tobogganing you must have been tobogganing he must have been tobogganing we must have been tobogganing you must have been tobogganing they must have been tobogganing

Negation

Simple form	V-ing form
I mustn't toboggan you mustn't toboggan he mustn't toboggan we mustn't toboggan you mustn't toboggan they mustn't toboggan	I mustn't be tobogganing you mustn't be tobogganing he mustn't be tobogganing we mustn't be tobogganing you mustn't be tobogganing they mustn't be tobogganing
Perfect	V-ing perfect
I mustn't have tobogganed you mustn't have tobogganed he mustn't have tobogganed we mustn't have tobogganed you mustn't have tobogganed they mustn't have tobogganed	I mustn't have been tobogganing you mustn't have been tobogganing he mustn't have been tobogganing we mustn't have been tobogganing you mustn't have been tobogganing they mustn't have been tobogganing

Interrogative form

Simple form	V-ing form
must I toboggan? must you toboggan? must he toboggan? must we toboggan? must you toboggan? must they toboggan?	must I be tobogganing? must you be tobogganing? must he be tobogganing? must we be tobogganing? must you be tobogganing? must they be tobogganing?
Perfect	V-ing perfect
must I have tobogganed? must you have tobogganed? must he have tobogganed? must we have tobogganed? must you have tobogganed? must they have tobogganed?	must I have been tobogganing? must you have been tobogganing? must he have been tobogganing? must we have been tobogganing? must you have been tobogganing? must they have been tobogganing?

Interro-negative form

Simple form	V-ing form
mustn't I toboggan? mustn't you toboggan? mustn't he toboggan? mustn't we toboggan? mustn't you toboggan? mustn't they toboggan?	mustn't I be tobogganing? mustn't you be tobogganing? mustn't he be tobogganing? mustn't we be tobogganing? mustn't you be tobogganing? mustn't they be tobogganing?
Perfect	V-ing perfect
mustn't I have tobogganed? mustn't you have tobogganed? mustn't he have tobogganed? mustn't we have tobogganed? mustn't you have tobogganed? mustn't they have tobogganed?	mustn't I have been tobogganing? mustn't you have been tobogganing? mustn't he have been tobogganing? mustn't we have been tobogganing? mustn't you have been tobogganing? mustn't they have been tobogganing?