Waste must be treated so that it does not become a danger to life.
我们英语老师说, so that 引导的目的状语从句最重要的特点, 就是使用情态动词, 如can, may, will, could, might, would 等。这是它与 so that 引导的结果状语从句本质区别之一。
上句中的 so that 从句使用一般现在时是否有误？
你们英语老师讲的基本上是正确的。例如：
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Drive carefully so that everyone can enjoy a long life. 开车小心点，让大家多活几年。
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They put a cap on the ground in front of them, so that people who like the music can drop coins into it. 他们把帽子放在身前的地上，为的是让喜欢这种音乐的人把硬币投到帽子里。
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All four of them were clutching seating plans, so that they could help show people to the right seats. (J. K. Rowling, Harry Potter and the Deathly Hallows) 他们四个手里都拿着一份婚礼的座位安排表，以便能帮助和指引客人找到他们正确的座位。（《哈利·波特与死亡圣徒》）
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I offer ten times the money that Antonio has borrowed. Please change the law a little so that we may save Antonio. 我愿出十倍于安东尼奥借的钱,请您把法律稍微变更一下,以便我们能够救安东尼奥的生命。
但是,应当补充一句:so that 引导的目的状语从句有时也使用一般现在时或一般将来时。因此,你所提问的那个句子是正确的。再如:
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You should keep milk in a fridge so that it stays fresh. 你应当把牛奶保存在冰箱里，使它保鲜。
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Wear tight clothing without collars or belts so that it doesn't catch on any of the equipment. 穿无领紧身衣裤，不系领带和腰带，以防被器械挂住。
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You have to be able to plan your work so that all your jobs will be finished in time. 你必须能够制定工作计划，以便你的全部工作都能按时完成。
请做下面的英语试题：
- I hurried ____ I wouldn't be late for class.
A. since B. so that C. as if D. unless(全国高考)
- They held a meeting ____ they could hear everyone's ideas. A. even if B. until C. while D. so that(上海会考,96-20)