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