词组	know A from B
释义	●ˈknow A from Bto be able to recognize the difference between two things 能区分，能辨别（两事物）◆She doesn’t know a Rolls Royce from a Renault. 她分辨不出劳斯莱斯车和雷诺车。 NOTE Not used in the passive. 不用于被动语态。[v + n/pron + prep] ●not know your ˌarse from your ˈelbow (BrE, ⚠, slang) to be very stupid or completely lacking in skill 蠢笨至极；屁都不懂◆He doesn’t know his arse from his elbow. 他是个大白痴。
随便看	be off sb/sth be on be on about sth (informal, especially BrE) be on sb be on sth be onto sb (informal) be onto sth be out be out for sth be out of sth be out to do sth be over sb be over sth be past it (informal) be put out be queuing up for sth/to do sth be rained off (BrE) be rained out be ranged against/with sb/sth be riddled with sth be set back (from sth) be shacked up with sb be shorn of sth (literary) be shrouded in sth be sold on sth (informal)

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