English verb conjugation
MUST SAILPLANE

Regular verb: sailplane - sailplaned - sailplaned

Affirmation

Simple form	V-ing form
I must sailplane you must sailplane she must sailplane we must sailplane you must sailplane they must sailplane	I must be sailplaning you must be sailplaning she 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 she 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 she 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 she 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 she 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 she 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 she 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 she sailplane? must we sailplane? must you sailplane? must they sailplane?	must I be sailplaning? must you be sailplaning? must she 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 she 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 she 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 she 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 she 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 she 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 she have been sailplaning? mustn't we have been sailplaning? mustn't you have been sailplaning? mustn't they have been sailplaning?