1. Instead of spending your vacation on a bus, ... you may want to try hiking. Instead和instead of的用法
2. Say "Hi" / "Hello" / "Thanks" to sb. (for me)问候的句型
3. Is anybody seeing you off?进行时表将来
4. She struggled and struggled, and could not get on her feet. (= keep struggling)
5. You should not go rafting unless you know... unless引导条件状语从句，相当于if... not
6. By staying at..., tourists can help the villagers make money so that they can take care of the fiver and the birds.目的状语从句
7. She was so surprised that she couldn't move.结果状语从句
8. Tree after tree went down, cut down by water.过去分词作状语
9. The next moment, the first wave swept her down, swallowing the garden.现在分词作状语
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
