I must whinny you must whinny she must whinny we must whinny you must whinny they must whinny
V-ing form
I must be whinnying you must be whinnying she must be whinnying we must be whinnying you must be whinnying they must be whinnying
Perfect
I must have whinnied you must have whinnied she must have whinnied we must have whinnied you must have whinnied they must have whinnied
V-ing perfect
I must have been whinnying you must have been whinnying she must have been whinnying we must have been whinnying you must have been whinnying they must have been whinnying
Negation
Simple form
I must not whinny you must not whinny she must not whinny we must not whinny you must not whinny they must not whinny
V-ing form
I must not be whinnying you must not be whinnying she must not be whinnying we must not be whinnying you must not be whinnying they must not be whinnying
Perfect
I must not have whinnied you must not have whinnied she must not have whinnied we must not have whinnied you must not have whinnied they must not have whinnied
V-ing perfect
I must not have been whinnying you must not have been whinnying she must not have been whinnying we must not have been whinnying you must not have been whinnying they must not have been whinnying
Interrogative form
Simple form
must I whinny? must you whinny? must she whinny? must we whinny? must you whinny? must they whinny?
V-ing form
must I be whinnying? must you be whinnying? must she be whinnying? must we be whinnying? must you be whinnying? must they be whinnying?
Perfect
must I have whinnied? must you have whinnied? must she have whinnied? must we have whinnied? must you have whinnied? must they have whinnied?
V-ing perfect
must I have been whinnying? must you have been whinnying? must she have been whinnying? must we have been whinnying? must you have been whinnying? must they have been whinnying?
Interro-negative form
Simple form
must I not whinny? must you not whinny? must she not whinny? must we not whinny? must you not whinny? must they not whinny?
V-ing form
must I not be whinnying? must you not be whinnying? must she not be whinnying? must we not be whinnying? must you not be whinnying? must they not be whinnying?
Perfect
must I not have whinnied? must you not have whinnied? must she not have whinnied? must we not have whinnied? must you not have whinnied? must they not have whinnied?
V-ing perfect
must I not have been whinnying? must you not have been whinnying? must she not have been whinnying? must we not have been whinnying? must you not have been whinnying? must they not have been whinnying?