I must clinch you must clinch she must clinch we must clinch you must clinch they must clinch
V-ing form
I must be clinching you must be clinching she must be clinching we must be clinching you must be clinching they must be clinching
Perfect
I must have clinched you must have clinched she must have clinched we must have clinched you must have clinched they must have clinched
V-ing perfect
I must have been clinching you must have been clinching she must have been clinching we must have been clinching you must have been clinching they must have been clinching
Negation
Simple form
I must not clinch you must not clinch she must not clinch we must not clinch you must not clinch they must not clinch
V-ing form
I must not be clinching you must not be clinching she must not be clinching we must not be clinching you must not be clinching they must not be clinching
Perfect
I must not have clinched you must not have clinched she must not have clinched we must not have clinched you must not have clinched they must not have clinched
V-ing perfect
I must not have been clinching you must not have been clinching she must not have been clinching we must not have been clinching you must not have been clinching they must not have been clinching
Interrogative form
Simple form
must I clinch? must you clinch? must she clinch? must we clinch? must you clinch? must they clinch?
V-ing form
must I be clinching? must you be clinching? must she be clinching? must we be clinching? must you be clinching? must they be clinching?
Perfect
must I have clinched? must you have clinched? must she have clinched? must we have clinched? must you have clinched? must they have clinched?
V-ing perfect
must I have been clinching? must you have been clinching? must she have been clinching? must we have been clinching? must you have been clinching? must they have been clinching?
Interro-negative form
Simple form
must I not clinch? must you not clinch? must she not clinch? must we not clinch? must you not clinch? must they not clinch?
V-ing form
must I not be clinching? must you not be clinching? must she not be clinching? must we not be clinching? must you not be clinching? must they not be clinching?
Perfect
must I not have clinched? must you not have clinched? must she not have clinched? must we not have clinched? must you not have clinched? must they not have clinched?
V-ing perfect
must I not have been clinching? must you not have been clinching? must she not have been clinching? must we not have been clinching? must you not have been clinching? must they not have been clinching?