I must inject you must inject he must inject we must inject you must inject they must inject
V-ing form
I must be injecting you must be injecting he must be injecting we must be injecting you must be injecting they must be injecting
Perfect
I must have injected you must have injected he must have injected we must have injected you must have injected they must have injected
V-ing perfect
I must have been injecting you must have been injecting he must have been injecting we must have been injecting you must have been injecting they must have been injecting
Negation
Simple form
I must not inject you must not inject he must not inject we must not inject you must not inject they must not inject
V-ing form
I must not be injecting you must not be injecting he must not be injecting we must not be injecting you must not be injecting they must not be injecting
Perfect
I must not have injected you must not have injected he must not have injected we must not have injected you must not have injected they must not have injected
V-ing perfect
I must not have been injecting you must not have been injecting he must not have been injecting we must not have been injecting you must not have been injecting they must not have been injecting
Interrogative form
Simple form
must I inject? must you inject? must he inject? must we inject? must you inject? must they inject?
V-ing form
must I be injecting? must you be injecting? must he be injecting? must we be injecting? must you be injecting? must they be injecting?
Perfect
must I have injected? must you have injected? must he have injected? must we have injected? must you have injected? must they have injected?
V-ing perfect
must I have been injecting? must you have been injecting? must he have been injecting? must we have been injecting? must you have been injecting? must they have been injecting?
Interro-negative form
Simple form
must I not inject? must you not inject? must he not inject? must we not inject? must you not inject? must they not inject?
V-ing form
must I not be injecting? must you not be injecting? must he not be injecting? must we not be injecting? must you not be injecting? must they not be injecting?
Perfect
must I not have injected? must you not have injected? must he not have injected? must we not have injected? must you not have injected? must they not have injected?
V-ing perfect
must I not have been injecting? must you not have been injecting? must he not have been injecting? must we not have been injecting? must you not have been injecting? must they not have been injecting?