English verb conjugation
MUST TRAVEL

Regular verb: travel - travelled - travelled

Affirmation

Simple form	V-ing form
I must travel you must travel he must travel we must travel you must travel they must travel	I must be travelling you must be travelling he must be travelling we must be travelling you must be travelling they must be travelling
Perfect	V-ing perfect
I must have travelled you must have travelled he must have travelled we must have travelled you must have travelled they must have travelled	I must have been travelling you must have been travelling he must have been travelling we must have been travelling you must have been travelling they must have been travelling

Negation

Simple form	V-ing form
I mustn't travel you mustn't travel he mustn't travel we mustn't travel you mustn't travel they mustn't travel	I mustn't be travelling you mustn't be travelling he mustn't be travelling we mustn't be travelling you mustn't be travelling they mustn't be travelling
Perfect	V-ing perfect
I mustn't have travelled you mustn't have travelled he mustn't have travelled we mustn't have travelled you mustn't have travelled they mustn't have travelled	I mustn't have been travelling you mustn't have been travelling he mustn't have been travelling we mustn't have been travelling you mustn't have been travelling they mustn't have been travelling

Interrogative form

Simple form	V-ing form
must I travel? must you travel? must he travel? must we travel? must you travel? must they travel?	must I be travelling? must you be travelling? must he be travelling? must we be travelling? must you be travelling? must they be travelling?
Perfect	V-ing perfect
must I have travelled? must you have travelled? must he have travelled? must we have travelled? must you have travelled? must they have travelled?	must I have been travelling? must you have been travelling? must he have been travelling? must we have been travelling? must you have been travelling? must they have been travelling?

Interro-negative form

Simple form	V-ing form
mustn't I travel? mustn't you travel? mustn't he travel? mustn't we travel? mustn't you travel? mustn't they travel?	mustn't I be travelling? mustn't you be travelling? mustn't he be travelling? mustn't we be travelling? mustn't you be travelling? mustn't they be travelling?
Perfect	V-ing perfect
mustn't I have travelled? mustn't you have travelled? mustn't he have travelled? mustn't we have travelled? mustn't you have travelled? mustn't they have travelled?	mustn't I have been travelling? mustn't you have been travelling? mustn't he have been travelling? mustn't we have been travelling? mustn't you have been travelling? mustn't they have been travelling?