過去式動詞後接過去式動詞嗎?還是原V

[a156832 (勇敢)]

過去式動詞後接過去式動詞嗎?

如 They knew I fell in love with her.

還是fall....原V.

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→ a156832:考試時看到過去動詞後面空格不知該填什麼..