I must pooh-pooh you must pooh-pooh she must pooh-pooh we must pooh-pooh you must pooh-pooh they must pooh-pooh
V-ing form
I must be pooh-poohing you must be pooh-poohing she must be pooh-poohing we must be pooh-poohing you must be pooh-poohing they must be pooh-poohing
Perfect
I must have pooh-poohed you must have pooh-poohed she must have pooh-poohed we must have pooh-poohed you must have pooh-poohed they must have pooh-poohed
V-ing perfect
I must have been pooh-poohing you must have been pooh-poohing she must have been pooh-poohing we must have been pooh-poohing you must have been pooh-poohing they must have been pooh-poohing
Negation
Simple form
I must not pooh-pooh you must not pooh-pooh she must not pooh-pooh we must not pooh-pooh you must not pooh-pooh they must not pooh-pooh
V-ing form
I must not be pooh-poohing you must not be pooh-poohing she must not be pooh-poohing we must not be pooh-poohing you must not be pooh-poohing they must not be pooh-poohing
Perfect
I must not have pooh-poohed you must not have pooh-poohed she must not have pooh-poohed we must not have pooh-poohed you must not have pooh-poohed they must not have pooh-poohed
V-ing perfect
I must not have been pooh-poohing you must not have been pooh-poohing she must not have been pooh-poohing we must not have been pooh-poohing you must not have been pooh-poohing they must not have been pooh-poohing
Interrogative form
Simple form
must I pooh-pooh? must you pooh-pooh? must she pooh-pooh? must we pooh-pooh? must you pooh-pooh? must they pooh-pooh?
V-ing form
must I be pooh-poohing? must you be pooh-poohing? must she be pooh-poohing? must we be pooh-poohing? must you be pooh-poohing? must they be pooh-poohing?
Perfect
must I have pooh-poohed? must you have pooh-poohed? must she have pooh-poohed? must we have pooh-poohed? must you have pooh-poohed? must they have pooh-poohed?
V-ing perfect
must I have been pooh-poohing? must you have been pooh-poohing? must she have been pooh-poohing? must we have been pooh-poohing? must you have been pooh-poohing? must they have been pooh-poohing?
Interro-negative form
Simple form
must I not pooh-pooh? must you not pooh-pooh? must she not pooh-pooh? must we not pooh-pooh? must you not pooh-pooh? must they not pooh-pooh?
V-ing form
must I not be pooh-poohing? must you not be pooh-poohing? must she not be pooh-poohing? must we not be pooh-poohing? must you not be pooh-poohing? must they not be pooh-poohing?
Perfect
must I not have pooh-poohed? must you not have pooh-poohed? must she not have pooh-poohed? must we not have pooh-poohed? must you not have pooh-poohed? must they not have pooh-poohed?
V-ing perfect
must I not have been pooh-poohing? must you not have been pooh-poohing? must she not have been pooh-poohing? must we not have been pooh-poohing? must you not have been pooh-poohing? must they not have been pooh-poohing?