English verb conjugation
MUST SAILPLANE

Regular verb: sailplane - sailplaned - sailplaned

Affirmation

Simple form	V-ing form
I must sailplane you must sailplane he must sailplane we must sailplane you must sailplane they must sailplane	I must be sailplaning you must be sailplaning he must be sailplaning we must be sailplaning you must be sailplaning they must be sailplaning
Perfect	V-ing perfect
I must have sailplaned you must have sailplaned he must have sailplaned we must have sailplaned you must have sailplaned they must have sailplaned	I must have been sailplaning you must have been sailplaning he must have been sailplaning we must have been sailplaning you must have been sailplaning they must have been sailplaning

Negation

Simple form	V-ing form
I mustn't sailplane you mustn't sailplane he mustn't sailplane we mustn't sailplane you mustn't sailplane they mustn't sailplane	I mustn't be sailplaning you mustn't be sailplaning he mustn't be sailplaning we mustn't be sailplaning you mustn't be sailplaning they mustn't be sailplaning
Perfect	V-ing perfect
I mustn't have sailplaned you mustn't have sailplaned he mustn't have sailplaned we mustn't have sailplaned you mustn't have sailplaned they mustn't have sailplaned	I mustn't have been sailplaning you mustn't have been sailplaning he mustn't have been sailplaning we mustn't have been sailplaning you mustn't have been sailplaning they mustn't have been sailplaning

Interrogative form

Simple form	V-ing form
must I sailplane? must you sailplane? must he sailplane? must we sailplane? must you sailplane? must they sailplane?	must I be sailplaning? must you be sailplaning? must he be sailplaning? must we be sailplaning? must you be sailplaning? must they be sailplaning?
Perfect	V-ing perfect
must I have sailplaned? must you have sailplaned? must he have sailplaned? must we have sailplaned? must you have sailplaned? must they have sailplaned?	must I have been sailplaning? must you have been sailplaning? must he have been sailplaning? must we have been sailplaning? must you have been sailplaning? must they have been sailplaning?

Interro-negative form

Simple form	V-ing form
mustn't I sailplane? mustn't you sailplane? mustn't he sailplane? mustn't we sailplane? mustn't you sailplane? mustn't they sailplane?	mustn't I be sailplaning? mustn't you be sailplaning? mustn't he be sailplaning? mustn't we be sailplaning? mustn't you be sailplaning? mustn't they be sailplaning?
Perfect	V-ing perfect
mustn't I have sailplaned? mustn't you have sailplaned? mustn't he have sailplaned? mustn't we have sailplaned? mustn't you have sailplaned? mustn't they have sailplaned?	mustn't I have been sailplaning? mustn't you have been sailplaning? mustn't he have been sailplaning? mustn't we have been sailplaning? mustn't you have been sailplaning? mustn't they have been sailplaning?