I must feign you must feign he must feign we must feign you must feign they must feign
V-ing form
I must be feigning you must be feigning he must be feigning we must be feigning you must be feigning they must be feigning
Perfect
I must have feigned you must have feigned he must have feigned we must have feigned you must have feigned they must have feigned
V-ing perfect
I must have been feigning you must have been feigning he must have been feigning we must have been feigning you must have been feigning they must have been feigning
Negation
Simple form
I must not feign you must not feign he must not feign we must not feign you must not feign they must not feign
V-ing form
I must not be feigning you must not be feigning he must not be feigning we must not be feigning you must not be feigning they must not be feigning
Perfect
I must not have feigned you must not have feigned he must not have feigned we must not have feigned you must not have feigned they must not have feigned
V-ing perfect
I must not have been feigning you must not have been feigning he must not have been feigning we must not have been feigning you must not have been feigning they must not have been feigning
Interrogative form
Simple form
must I feign? must you feign? must he feign? must we feign? must you feign? must they feign?
V-ing form
must I be feigning? must you be feigning? must he be feigning? must we be feigning? must you be feigning? must they be feigning?
Perfect
must I have feigned? must you have feigned? must he have feigned? must we have feigned? must you have feigned? must they have feigned?
V-ing perfect
must I have been feigning? must you have been feigning? must he have been feigning? must we have been feigning? must you have been feigning? must they have been feigning?
Interro-negative form
Simple form
must I not feign? must you not feign? must he not feign? must we not feign? must you not feign? must they not feign?
V-ing form
must I not be feigning? must you not be feigning? must he not be feigning? must we not be feigning? must you not be feigning? must they not be feigning?
Perfect
must I not have feigned? must you not have feigned? must he not have feigned? must we not have feigned? must you not have feigned? must they not have feigned?
V-ing perfect
must I not have been feigning? must you not have been feigning? must he not have been feigning? must we not have been feigning? must you not have been feigning? must they not have been feigning?