English verb conjugation
MUST PRECAUTION

Regular verb: precaution - precautioned - precautioned

Affirmation

Simple form	V-ing form
I must precaution you must precaution she must precaution we must precaution you must precaution they must precaution	I must be precautioning you must be precautioning she must be precautioning we must be precautioning you must be precautioning they must be precautioning
Perfect	V-ing perfect
I must have precautioned you must have precautioned she must have precautioned we must have precautioned you must have precautioned they must have precautioned	I must have been precautioning you must have been precautioning she must have been precautioning we must have been precautioning you must have been precautioning they must have been precautioning

Negation

Simple form	V-ing form
I mustn't precaution you mustn't precaution she mustn't precaution we mustn't precaution you mustn't precaution they mustn't precaution	I mustn't be precautioning you mustn't be precautioning she mustn't be precautioning we mustn't be precautioning you mustn't be precautioning they mustn't be precautioning
Perfect	V-ing perfect
I mustn't have precautioned you mustn't have precautioned she mustn't have precautioned we mustn't have precautioned you mustn't have precautioned they mustn't have precautioned	I mustn't have been precautioning you mustn't have been precautioning she mustn't have been precautioning we mustn't have been precautioning you mustn't have been precautioning they mustn't have been precautioning

Interrogative form

Simple form	V-ing form
must I precaution? must you precaution? must she precaution? must we precaution? must you precaution? must they precaution?	must I be precautioning? must you be precautioning? must she be precautioning? must we be precautioning? must you be precautioning? must they be precautioning?
Perfect	V-ing perfect
must I have precautioned? must you have precautioned? must she have precautioned? must we have precautioned? must you have precautioned? must they have precautioned?	must I have been precautioning? must you have been precautioning? must she have been precautioning? must we have been precautioning? must you have been precautioning? must they have been precautioning?

Interro-negative form

Simple form	V-ing form
mustn't I precaution? mustn't you precaution? mustn't she precaution? mustn't we precaution? mustn't you precaution? mustn't they precaution?	mustn't I be precautioning? mustn't you be precautioning? mustn't she be precautioning? mustn't we be precautioning? mustn't you be precautioning? mustn't they be precautioning?
Perfect	V-ing perfect
mustn't I have precautioned? mustn't you have precautioned? mustn't she have precautioned? mustn't we have precautioned? mustn't you have precautioned? mustn't they have precautioned?	mustn't I have been precautioning? mustn't you have been precautioning? mustn't she have been precautioning? mustn't we have been precautioning? mustn't you have been precautioning? mustn't they have been precautioning?