English verb conjugation
MUST CRASH-LAND

Regular verb: crash-land - crash-landed - crash-landed

Affirmation

Simple form	V-ing form
I must crash-land you must crash-land he must crash-land we must crash-land you must crash-land they must crash-land	I must be crash-landing you must be crash-landing he must be crash-landing we must be crash-landing you must be crash-landing they must be crash-landing
Perfect	V-ing perfect
I must have crash-landed you must have crash-landed he must have crash-landed we must have crash-landed you must have crash-landed they must have crash-landed	I must have been crash-landing you must have been crash-landing he must have been crash-landing we must have been crash-landing you must have been crash-landing they must have been crash-landing

Negation

Simple form	V-ing form
I mustn't crash-land you mustn't crash-land he mustn't crash-land we mustn't crash-land you mustn't crash-land they mustn't crash-land	I mustn't be crash-landing you mustn't be crash-landing he mustn't be crash-landing we mustn't be crash-landing you mustn't be crash-landing they mustn't be crash-landing
Perfect	V-ing perfect
I mustn't have crash-landed you mustn't have crash-landed he mustn't have crash-landed we mustn't have crash-landed you mustn't have crash-landed they mustn't have crash-landed	I mustn't have been crash-landing you mustn't have been crash-landing he mustn't have been crash-landing we mustn't have been crash-landing you mustn't have been crash-landing they mustn't have been crash-landing

Interrogative form

Simple form	V-ing form
must I crash-land? must you crash-land? must he crash-land? must we crash-land? must you crash-land? must they crash-land?	must I be crash-landing? must you be crash-landing? must he be crash-landing? must we be crash-landing? must you be crash-landing? must they be crash-landing?
Perfect	V-ing perfect
must I have crash-landed? must you have crash-landed? must he have crash-landed? must we have crash-landed? must you have crash-landed? must they have crash-landed?	must I have been crash-landing? must you have been crash-landing? must he have been crash-landing? must we have been crash-landing? must you have been crash-landing? must they have been crash-landing?

Interro-negative form

Simple form	V-ing form
mustn't I crash-land? mustn't you crash-land? mustn't he crash-land? mustn't we crash-land? mustn't you crash-land? mustn't they crash-land?	mustn't I be crash-landing? mustn't you be crash-landing? mustn't he be crash-landing? mustn't we be crash-landing? mustn't you be crash-landing? mustn't they be crash-landing?
Perfect	V-ing perfect
mustn't I have crash-landed? mustn't you have crash-landed? mustn't he have crash-landed? mustn't we have crash-landed? mustn't you have crash-landed? mustn't they have crash-landed?	mustn't I have been crash-landing? mustn't you have been crash-landing? mustn't he have been crash-landing? mustn't we have been crash-landing? mustn't you have been crash-landing? mustn't they have been crash-landing?