I may thicken you may thicken he may thicken we may thicken you may thicken they may thicken
V-ing form
I may be thickening you may be thickening he may be thickening we may be thickening you may be thickening they may be thickening
Perfect
I may have thickened you may have thickened he may have thickened we may have thickened you may have thickened they may have thickened
V-ing perfect
I may have been thickening you may have been thickening he may have been thickening we may have been thickening you may have been thickening they may have been thickening
Negation
Simple form
I may not thicken you may not thicken he may not thicken we may not thicken you may not thicken they may not thicken
V-ing form
I may not be thickening you may not be thickening he may not be thickening we may not be thickening you may not be thickening they may not be thickening
Perfect
I may not have thickened you may not have thickened he may not have thickened we may not have thickened you may not have thickened they may not have thickened
V-ing perfect
I may not have been thickening you may not have been thickening he may not have been thickening we may not have been thickening you may not have been thickening they may not have been thickening
Interrogative form
Simple form
may I thicken? may you thicken? may he thicken? may we thicken? may you thicken? may they thicken?
V-ing form
may I be thickening? may you be thickening? may he be thickening? may we be thickening? may you be thickening? may they be thickening?
Perfect
may I have thickened? may you have thickened? may he have thickened? may we have thickened? may you have thickened? may they have thickened?
V-ing perfect
may I have been thickening? may you have been thickening? may he have been thickening? may we have been thickening? may you have been thickening? may they have been thickening?
Interro-negative form
Simple form
may I not thicken? may you not thicken? may he not thicken? may we not thicken? may you not thicken? may they not thicken?
V-ing form
may I not be thickening? may you not be thickening? may he not be thickening? may we not be thickening? may you not be thickening? may they not be thickening?
Perfect
may I not have thickened? may you not have thickened? may he not have thickened? may we not have thickened? may you not have thickened? may they not have thickened?
V-ing perfect
may I not have been thickening? may you not have been thickening? may he not have been thickening? may we not have been thickening? may you not have been thickening? may they not have been thickening?