被動式的will和shall

請問各位高手
為何She will punish me改成被動時,會寫成 I shall be punishes by her?
第一,我常不知何時加be.第二,用到will時,就會用shall改成被動,用...
例:I shall have done it./It will have been done by me.為何不能沿用問題的shall?
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