1、介词兼副词about作周围，四周，附近，身上讲，例如，there is a white fence about the house或者 there is a strang髫潋啜缅e smell about him
3、介词about作关于或涉及，从事讲，从本义围绕引申过来， 例如，what are you talking about? the question is about what to do next.
5、be about+不定式动词，表示立即或正要做某事，或似乎立即正要做某事，例如she is about to speak，她正要讲
