I must photosynthesize you must photosynthesize she must photosynthesize we must photosynthesize you must photosynthesize they must photosynthesize
V-ing form
I must be photosynthesizing you must be photosynthesizing she must be photosynthesizing we must be photosynthesizing you must be photosynthesizing they must be photosynthesizing
Perfect
I must have photosynthesized you must have photosynthesized she must have photosynthesized we must have photosynthesized you must have photosynthesized they must have photosynthesized
V-ing perfect
I must have been photosynthesizing you must have been photosynthesizing she must have been photosynthesizing we must have been photosynthesizing you must have been photosynthesizing they must have been photosynthesizing
Negation
Simple form
I must not photosynthesize you must not photosynthesize she must not photosynthesize we must not photosynthesize you must not photosynthesize they must not photosynthesize
V-ing form
I must not be photosynthesizing you must not be photosynthesizing she must not be photosynthesizing we must not be photosynthesizing you must not be photosynthesizing they must not be photosynthesizing
Perfect
I must not have photosynthesized you must not have photosynthesized she must not have photosynthesized we must not have photosynthesized you must not have photosynthesized they must not have photosynthesized
V-ing perfect
I must not have been photosynthesizing you must not have been photosynthesizing she must not have been photosynthesizing we must not have been photosynthesizing you must not have been photosynthesizing they must not have been photosynthesizing
Interrogative form
Simple form
must I photosynthesize? must you photosynthesize? must she photosynthesize? must we photosynthesize? must you photosynthesize? must they photosynthesize?
V-ing form
must I be photosynthesizing? must you be photosynthesizing? must she be photosynthesizing? must we be photosynthesizing? must you be photosynthesizing? must they be photosynthesizing?
Perfect
must I have photosynthesized? must you have photosynthesized? must she have photosynthesized? must we have photosynthesized? must you have photosynthesized? must they have photosynthesized?
V-ing perfect
must I have been photosynthesizing? must you have been photosynthesizing? must she have been photosynthesizing? must we have been photosynthesizing? must you have been photosynthesizing? must they have been photosynthesizing?
Interro-negative form
Simple form
must I not photosynthesize? must you not photosynthesize? must she not photosynthesize? must we not photosynthesize? must you not photosynthesize? must they not photosynthesize?
V-ing form
must I not be photosynthesizing? must you not be photosynthesizing? must she not be photosynthesizing? must we not be photosynthesizing? must you not be photosynthesizing? must they not be photosynthesizing?
Perfect
must I not have photosynthesized? must you not have photosynthesized? must she not have photosynthesized? must we not have photosynthesized? must you not have photosynthesized? must they not have photosynthesized?
V-ing perfect
must I not have been photosynthesizing? must you not have been photosynthesizing? must she not have been photosynthesizing? must we not have been photosynthesizing? must you not have been photosynthesizing? must they not have been photosynthesizing?