一個介係詞的句型問題

The mother has to save Bill from getting punished and, in the process, she teaches her husband a lesson.

介係詞from後面不是只能接名詞或動名詞嗎
這樣不是應該寫成getting punishment嗎?

感謝解惑
Update: 感謝呆大與誨人不倦大,是否能多說一些接getting punished與getting punishment的不同,

punished這邊是以補語型態修飾動名詞getting嗎,那這邊gettin...
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