I can fluoresce you can fluoresce he can fluoresce we can fluoresce you can fluoresce they can fluoresce
V-ing form
I can be fluorescing you can be fluorescing he can be fluorescing we can be fluorescing you can be fluorescing they can be fluorescing
Perfect
I can have fluoresced you can have fluoresced he can have fluoresced we can have fluoresced you can have fluoresced they can have fluoresced
V-ing perfect
I can have been fluorescing you can have been fluorescing he can have been fluorescing we can have been fluorescing you can have been fluorescing they can have been fluorescing
Negation
Simple form
I can't fluoresce you can't fluoresce he can't fluoresce we can't fluoresce you can't fluoresce they can't fluoresce
V-ing form
I can't be fluorescing you can't be fluorescing he can't be fluorescing we can't be fluorescing you can't be fluorescing they can't be fluorescing
Perfect
I can't have fluoresced you can't have fluoresced he can't have fluoresced we can't have fluoresced you can't have fluoresced they can't have fluoresced
V-ing perfect
I can't have been fluorescing you can't have been fluorescing he can't have been fluorescing we can't have been fluorescing you can't have been fluorescing they can't have been fluorescing
Interrogative form
Simple form
can I fluoresce? can you fluoresce? can he fluoresce? can we fluoresce? can you fluoresce? can they fluoresce?
V-ing form
can I be fluorescing? can you be fluorescing? can he be fluorescing? can we be fluorescing? can you be fluorescing? can they be fluorescing?
Perfect
can I have fluoresced? can you have fluoresced? can he have fluoresced? can we have fluoresced? can you have fluoresced? can they have fluoresced?
V-ing perfect
can I have been fluorescing? can you have been fluorescing? can he have been fluorescing? can we have been fluorescing? can you have been fluorescing? can they have been fluorescing?
Interro-negative form
Simple form
can't I fluoresce? can't you fluoresce? can't he fluoresce? can't we fluoresce? can't you fluoresce? can't they fluoresce?
V-ing form
can't I be fluorescing? can't you be fluorescing? can't he be fluorescing? can't we be fluorescing? can't you be fluorescing? can't they be fluorescing?
Perfect
can't I have fluoresced? can't you have fluoresced? can't he have fluoresced? can't we have fluoresced? can't you have fluoresced? can't they have fluoresced?
V-ing perfect
can't I have been fluorescing? can't you have been fluorescing? can't he have been fluorescing? can't we have been fluorescing? can't you have been fluorescing? can't they have been fluorescing?