prep.关于；大约；在 ... 周围
adv.大约；附近；到处；在周围
adj.即将的；正要的；在流行中的
It is about six o'clock now. 现在是六点钟左右。
It was a long flight and it took about fourteen hours. 时间真长,飞了大约十四个小时。
All about us in the store were piles of goods. 在这家店里,我们周围到处都是成堆的商品。
用作副词 (adv.)Dinner is about ready. 中饭就要做好了。
He spoke to a few spectators standing about. 他和站在附近的围观者交谈。
He's eighty now, and doesn't get about much any more. 他现在80岁了,不能再到处走动了。
He glanced quickly about and then stepped aside. 他向四周扫了一眼,然后站在一旁。
用作形容词 (adj.)He was about to start. 他即将动身。
A new book is about to be brought out. 一本新书即将出版。
I was about to go out when he called on me. 当他来访时，我正要外出。
There is a rumor about that they're getting divorced. 正传闻说他们要离婚。
在指“不久就要……”时，后通常接不定式，如about to start。也有接动名词，如about starting。但是不可再加表示时间的词，如不可说about starting at once；
指“大约”的意思时，表达方式有about ten，about half等。注意ten和half都是明确的数量，about不该用在“多少不定”的词前，如about more than ten，about less than half；
与at搭配使用时，about是副词，没有at时，about 是介词。句中可有at，也可没有，意思相同。 I went (at) about five (o'clock).
about + 不定式，表示“即将要去做某事”。 Don't go out now - we're about to have lunch.
about与动词go组成短语时，为副词，意为“着手做，从事”。
n.旋转；转变
adv.在这一带
