I can optimize you can optimize he can optimize we can optimize you can optimize they can optimize
V-ing form
I can be optimizing you can be optimizing he can be optimizing we can be optimizing you can be optimizing they can be optimizing
Perfect
I can have optimized you can have optimized he can have optimized we can have optimized you can have optimized they can have optimized
V-ing perfect
I can have been optimizing you can have been optimizing he can have been optimizing we can have been optimizing you can have been optimizing they can have been optimizing
Negation
Simple form
I can't optimize you can't optimize he can't optimize we can't optimize you can't optimize they can't optimize
V-ing form
I can't be optimizing you can't be optimizing he can't be optimizing we can't be optimizing you can't be optimizing they can't be optimizing
Perfect
I can't have optimized you can't have optimized he can't have optimized we can't have optimized you can't have optimized they can't have optimized
V-ing perfect
I can't have been optimizing you can't have been optimizing he can't have been optimizing we can't have been optimizing you can't have been optimizing they can't have been optimizing
Interrogative form
Simple form
can I optimize? can you optimize? can he optimize? can we optimize? can you optimize? can they optimize?
V-ing form
can I be optimizing? can you be optimizing? can he be optimizing? can we be optimizing? can you be optimizing? can they be optimizing?
Perfect
can I have optimized? can you have optimized? can he have optimized? can we have optimized? can you have optimized? can they have optimized?
V-ing perfect
can I have been optimizing? can you have been optimizing? can he have been optimizing? can we have been optimizing? can you have been optimizing? can they have been optimizing?
Interro-negative form
Simple form
can't I optimize? can't you optimize? can't he optimize? can't we optimize? can't you optimize? can't they optimize?
V-ing form
can't I be optimizing? can't you be optimizing? can't he be optimizing? can't we be optimizing? can't you be optimizing? can't they be optimizing?
Perfect
can't I have optimized? can't you have optimized? can't he have optimized? can't we have optimized? can't you have optimized? can't they have optimized?
V-ing perfect
can't I have been optimizing? can't you have been optimizing? can't he have been optimizing? can't we have been optimizing? can't you have been optimizing? can't they have been optimizing?