I must bask you must bask he must bask we must bask you must bask they must bask
V-ing form
I must be basking you must be basking he must be basking we must be basking you must be basking they must be basking
Perfect
I must have basked you must have basked he must have basked we must have basked you must have basked they must have basked
V-ing perfect
I must have been basking you must have been basking he must have been basking we must have been basking you must have been basking they must have been basking
Negation
Simple form
I must not bask you must not bask he must not bask we must not bask you must not bask they must not bask
V-ing form
I must not be basking you must not be basking he must not be basking we must not be basking you must not be basking they must not be basking
Perfect
I must not have basked you must not have basked he must not have basked we must not have basked you must not have basked they must not have basked
V-ing perfect
I must not have been basking you must not have been basking he must not have been basking we must not have been basking you must not have been basking they must not have been basking
Interrogative form
Simple form
must I bask? must you bask? must he bask? must we bask? must you bask? must they bask?
V-ing form
must I be basking? must you be basking? must he be basking? must we be basking? must you be basking? must they be basking?
Perfect
must I have basked? must you have basked? must he have basked? must we have basked? must you have basked? must they have basked?
V-ing perfect
must I have been basking? must you have been basking? must he have been basking? must we have been basking? must you have been basking? must they have been basking?
Interro-negative form
Simple form
must I not bask? must you not bask? must he not bask? must we not bask? must you not bask? must they not bask?
V-ing form
must I not be basking? must you not be basking? must he not be basking? must we not be basking? must you not be basking? must they not be basking?
Perfect
must I not have basked? must you not have basked? must he not have basked? must we not have basked? must you not have basked? must they not have basked?
V-ing perfect
must I not have been basking? must you not have been basking? must he not have been basking? must we not have been basking? must you not have been basking? must they not have been basking?