標題: [問題] 介系詞後面何種狀況才能直接接不定詞to？ [打印本頁]

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作者: claire165    時間: 2010-1-26 07:30     標題: 介系詞後面何種狀況才能直接接不定詞to？

介系詞後面何種狀況才能直接接不定詞to？
文法規則有規定介系詞後面不可直接接不定詞to，如She is good at to bake cookies.


請問在什麼情況下可以在介系詞後面加不定詞to，如.....what pains you were at to raise that sum....及they have been at to charge a much higher price...

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