I must picture you must picture he must picture we must picture you must picture they must picture
V-ing form
I must be picturing you must be picturing he must be picturing we must be picturing you must be picturing they must be picturing
Perfect
I must have pictured you must have pictured he must have pictured we must have pictured you must have pictured they must have pictured
V-ing perfect
I must have been picturing you must have been picturing he must have been picturing we must have been picturing you must have been picturing they must have been picturing
Negation
Simple form
I must not picture you must not picture he must not picture we must not picture you must not picture they must not picture
V-ing form
I must not be picturing you must not be picturing he must not be picturing we must not be picturing you must not be picturing they must not be picturing
Perfect
I must not have pictured you must not have pictured he must not have pictured we must not have pictured you must not have pictured they must not have pictured
V-ing perfect
I must not have been picturing you must not have been picturing he must not have been picturing we must not have been picturing you must not have been picturing they must not have been picturing
Interrogative form
Simple form
must I picture? must you picture? must he picture? must we picture? must you picture? must they picture?
V-ing form
must I be picturing? must you be picturing? must he be picturing? must we be picturing? must you be picturing? must they be picturing?
Perfect
must I have pictured? must you have pictured? must he have pictured? must we have pictured? must you have pictured? must they have pictured?
V-ing perfect
must I have been picturing? must you have been picturing? must he have been picturing? must we have been picturing? must you have been picturing? must they have been picturing?
Interro-negative form
Simple form
must I not picture? must you not picture? must he not picture? must we not picture? must you not picture? must they not picture?
V-ing form
must I not be picturing? must you not be picturing? must he not be picturing? must we not be picturing? must you not be picturing? must they not be picturing?
Perfect
must I not have pictured? must you not have pictured? must he not have pictured? must we not have pictured? must you not have pictured? must they not have pictured?
V-ing perfect
must I not have been picturing? must you not have been picturing? must he not have been picturing? must we not have been picturing? must you not have been picturing? must they not have been picturing?