1·Her head spins dizzily as soon as she sits up.
她一坐起来，就感到天旋地转。
—— 《柯林斯英汉双解大词典》
2·She sits for the photograph.
她坐下来照相。
3·She sits close to me.
她坐得离我很近。
4·One man sits up in his bed for an hour each afternoon to help drain the fluid from his lungs.
男子每天下午在床上坐一个小时，以便排出肺部的液体。
5·I'd bet that no one deliberately sits down to read with the purpose of not understanding the text.
我敢打赌，没有人特意坐下来阅读却为了不理解文本。