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led, and could not get on her feet. (= keep struggling) 5. You should not go rafting unless you know... unless引導(dǎo)條件狀語從句,相當(dāng)于if... not 6. By staying at..., tourists can help the villagers make money so that they can take care of the fiver and the ’狀語從句 7. She was so surprised that she couldn’t 8. Tree after tree went down, cut down by 9. The next moment, the first wave swept her down, swallowing the 10. However, before she could think twice, the water was upon her. It didn’t take long before the building was destroyed. before的用法 at 如:常用詞組有:at noon, at night 表示時(shí)間的at, in, on:表示片刻的時(shí)間,at 8 o’clock,at midnight, at the end of, at that time, at the beginning of, at the age of, at Christmas, at New Year等?! n表示一段的時(shí)間 如:in the morning, in the afternoon, in the evening, in October, in 1998, in summer, in the past, in the future等?! n總是跟日子有關(guān),on Monday