Regular verb: travel - travelled - travelled
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 |
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 |
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? |
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? |