I must deforest you must deforest she must deforest we must deforest you must deforest they must deforest
V-ing form
I must be deforesting you must be deforesting she must be deforesting we must be deforesting you must be deforesting they must be deforesting
Perfect
I must have deforested you must have deforested she must have deforested we must have deforested you must have deforested they must have deforested
V-ing perfect
I must have been deforesting you must have been deforesting she must have been deforesting we must have been deforesting you must have been deforesting they must have been deforesting
Negation
Simple form
I must not deforest you must not deforest she must not deforest we must not deforest you must not deforest they must not deforest
V-ing form
I must not be deforesting you must not be deforesting she must not be deforesting we must not be deforesting you must not be deforesting they must not be deforesting
Perfect
I must not have deforested you must not have deforested she must not have deforested we must not have deforested you must not have deforested they must not have deforested
V-ing perfect
I must not have been deforesting you must not have been deforesting she must not have been deforesting we must not have been deforesting you must not have been deforesting they must not have been deforesting
Interrogative form
Simple form
must I deforest? must you deforest? must she deforest? must we deforest? must you deforest? must they deforest?
V-ing form
must I be deforesting? must you be deforesting? must she be deforesting? must we be deforesting? must you be deforesting? must they be deforesting?
Perfect
must I have deforested? must you have deforested? must she have deforested? must we have deforested? must you have deforested? must they have deforested?
V-ing perfect
must I have been deforesting? must you have been deforesting? must she have been deforesting? must we have been deforesting? must you have been deforesting? must they have been deforesting?
Interro-negative form
Simple form
must I not deforest? must you not deforest? must she not deforest? must we not deforest? must you not deforest? must they not deforest?
V-ing form
must I not be deforesting? must you not be deforesting? must she not be deforesting? must we not be deforesting? must you not be deforesting? must they not be deforesting?
Perfect
must I not have deforested? must you not have deforested? must she not have deforested? must we not have deforested? must you not have deforested? must they not have deforested?
V-ing perfect
must I not have been deforesting? must you not have been deforesting? must she not have been deforesting? must we not have been deforesting? must you not have been deforesting? must they not have been deforesting?