from

1.from后面往往接介词或副词，如from behind the door, from under the table, from above和from below。

2.from five to eight men和from fifty to seventy feet等表达方式里的from往往省去。

3.from three o'clock to half past six和from three o'clock till（或until）half past six都可以说。

4.From the park to my house is only a quarter of a mile里的From the park to my house用作名词。

5.（from）May to October通常指5、6、7、8、9、10月，（from）May to October inclusive当然更明白。（from）May to October exclusive也很明白（5月和10月不算）。近几年来美国有from May through October的说法，意思是“从5月初到10月底”。