I may blacken you may blacken she may blacken we may blacken you may blacken they may blacken
V-ing form
I may be blackening you may be blackening she may be blackening we may be blackening you may be blackening they may be blackening
Perfect
I may have blackened you may have blackened she may have blackened we may have blackened you may have blackened they may have blackened
V-ing perfect
I may have been blackening you may have been blackening she may have been blackening we may have been blackening you may have been blackening they may have been blackening
Negation
Simple form
I may not blacken you may not blacken she may not blacken we may not blacken you may not blacken they may not blacken
V-ing form
I may not be blackening you may not be blackening she may not be blackening we may not be blackening you may not be blackening they may not be blackening
Perfect
I may not have blackened you may not have blackened she may not have blackened we may not have blackened you may not have blackened they may not have blackened
V-ing perfect
I may not have been blackening you may not have been blackening she may not have been blackening we may not have been blackening you may not have been blackening they may not have been blackening
Interrogative form
Simple form
may I blacken? may you blacken? may she blacken? may we blacken? may you blacken? may they blacken?
V-ing form
may I be blackening? may you be blackening? may she be blackening? may we be blackening? may you be blackening? may they be blackening?
Perfect
may I have blackened? may you have blackened? may she have blackened? may we have blackened? may you have blackened? may they have blackened?
V-ing perfect
may I have been blackening? may you have been blackening? may she have been blackening? may we have been blackening? may you have been blackening? may they have been blackening?
Interro-negative form
Simple form
may I not blacken? may you not blacken? may she not blacken? may we not blacken? may you not blacken? may they not blacken?
V-ing form
may I not be blackening? may you not be blackening? may she not be blackening? may we not be blackening? may you not be blackening? may they not be blackening?
Perfect
may I not have blackened? may you not have blackened? may she not have blackened? may we not have blackened? may you not have blackened? may they not have blackened?
V-ing perfect
may I not have been blackening? may you not have been blackening? may she not have been blackening? may we not have been blackening? may you not have been blackening? may they not have been blackening?