介词from用来表示做为起点的特定地点或时间，有从...起，从...来，免掉，因为等含义。可用来指定来源、起因、方法或用具。
In one year she turned from a problem child into a model student.
一年内，她从问题儿童变成了模范学生。
It takes at least an hour to get home from work.
下班回家至少得花一个小时。
For a long time his death was concealed from her.
他的死瞒了很长时间都没告诉她。
One of the panels had become detached from the main structure.
一块镶板已从主体结构上脱落。
They are campaigning to save the area from building development.
他们正开展一场反对在这个地区进行房地产开发的运动。
温馨提示：
