I can economize you can economize he can economize we can economize you can economize they can economize
V-ing form
I can be economizing you can be economizing he can be economizing we can be economizing you can be economizing they can be economizing
Perfect
I can have economized you can have economized he can have economized we can have economized you can have economized they can have economized
V-ing perfect
I can have been economizing you can have been economizing he can have been economizing we can have been economizing you can have been economizing they can have been economizing
Negation
Simple form
I can't economize you can't economize he can't economize we can't economize you can't economize they can't economize
V-ing form
I can't be economizing you can't be economizing he can't be economizing we can't be economizing you can't be economizing they can't be economizing
Perfect
I can't have economized you can't have economized he can't have economized we can't have economized you can't have economized they can't have economized
V-ing perfect
I can't have been economizing you can't have been economizing he can't have been economizing we can't have been economizing you can't have been economizing they can't have been economizing
Interrogative form
Simple form
can I economize? can you economize? can he economize? can we economize? can you economize? can they economize?
V-ing form
can I be economizing? can you be economizing? can he be economizing? can we be economizing? can you be economizing? can they be economizing?
Perfect
can I have economized? can you have economized? can he have economized? can we have economized? can you have economized? can they have economized?
V-ing perfect
can I have been economizing? can you have been economizing? can he have been economizing? can we have been economizing? can you have been economizing? can they have been economizing?
Interro-negative form
Simple form
can't I economize? can't you economize? can't he economize? can't we economize? can't you economize? can't they economize?
V-ing form
can't I be economizing? can't you be economizing? can't he be economizing? can't we be economizing? can't you be economizing? can't they be economizing?
Perfect
can't I have economized? can't you have economized? can't he have economized? can't we have economized? can't you have economized? can't they have economized?
V-ing perfect
can't I have been economizing? can't you have been economizing? can't he have been economizing? can't we have been economizing? can't you have been economizing? can't they have been economizing?