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 must not toboggan you must not toboggan he must not toboggan we must not toboggan you must not toboggan they must not toboggan	I must not be tobogganing you must not be tobogganing he must not be tobogganing we must not be tobogganing you must not be tobogganing they must not be tobogganing
Perfect	V-ing perfect
I must not have tobogganed you must not have tobogganed he must not have tobogganed we must not have tobogganed you must not have tobogganed they must not have tobogganed	I must not have been tobogganing you must not have been tobogganing he must not have been tobogganing we must not have been tobogganing you must not have been tobogganing they must not 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
must I not toboggan? must you not toboggan? must he not toboggan? must we not toboggan? must you not toboggan? must they not toboggan?	must I not be tobogganing? must you not be tobogganing? must he not be tobogganing? must we not be tobogganing? must you not be tobogganing? must they not be tobogganing?
Perfect	V-ing perfect
must I not have tobogganed? must you not have tobogganed? must he not have tobogganed? must we not have tobogganed? must you not have tobogganed? must they not have tobogganed?	must I not have been tobogganing? must you not have been tobogganing? must he not have been tobogganing? must we not have been tobogganing? must you not have been tobogganing? must they not have been tobogganing?