I must spray you must spray he must spray we must spray you must spray they must spray
V-ing form
I must be spraying you must be spraying he must be spraying we must be spraying you must be spraying they must be spraying
Perfect
I must have sprayed you must have sprayed he must have sprayed we must have sprayed you must have sprayed they must have sprayed
V-ing perfect
I must have been spraying you must have been spraying he must have been spraying we must have been spraying you must have been spraying they must have been spraying
Negation
Simple form
I mustn't spray you mustn't spray he mustn't spray we mustn't spray you mustn't spray they mustn't spray
V-ing form
I mustn't be spraying you mustn't be spraying he mustn't be spraying we mustn't be spraying you mustn't be spraying they mustn't be spraying
Perfect
I mustn't have sprayed you mustn't have sprayed he mustn't have sprayed we mustn't have sprayed you mustn't have sprayed they mustn't have sprayed
V-ing perfect
I mustn't have been spraying you mustn't have been spraying he mustn't have been spraying we mustn't have been spraying you mustn't have been spraying they mustn't have been spraying
Interrogative form
Simple form
must I spray? must you spray? must he spray? must we spray? must you spray? must they spray?
V-ing form
must I be spraying? must you be spraying? must he be spraying? must we be spraying? must you be spraying? must they be spraying?
Perfect
must I have sprayed? must you have sprayed? must he have sprayed? must we have sprayed? must you have sprayed? must they have sprayed?
V-ing perfect
must I have been spraying? must you have been spraying? must he have been spraying? must we have been spraying? must you have been spraying? must they have been spraying?
Interro-negative form
Simple form
mustn't I spray? mustn't you spray? mustn't he spray? mustn't we spray? mustn't you spray? mustn't they spray?
V-ing form
mustn't I be spraying? mustn't you be spraying? mustn't he be spraying? mustn't we be spraying? mustn't you be spraying? mustn't they be spraying?
Perfect
mustn't I have sprayed? mustn't you have sprayed? mustn't he have sprayed? mustn't we have sprayed? mustn't you have sprayed? mustn't they have sprayed?
V-ing perfect
mustn't I have been spraying? mustn't you have been spraying? mustn't he have been spraying? mustn't we have been spraying? mustn't you have been spraying? mustn't they have been spraying?