at和around都是介词,那么写at around six o'clock in the afternoon可以吗也可以写作 at about six o'clock in the afternoon

at和around都是介词,那么写at around six o'clock in the afternoon可以吗也可以写作 at about six o'clock in the afternoon He cut in at the head of the linecut in at...（in 和at 都是介词可以放在一起吗） 介词in on at 介词at的用法 at算不算介词 at(介词)什么意思 介词什么情况下可以和副词连用,什么情况下不可以?还是不太懂在词组get home ,go there,come here.中home,there,here均是地点副词前面均不用介词；而在词组at around at six o'clock 和 at about at six o'clock arou at around six fifteen是什么意思? in such a long time,中的介词是in,那么at为什么不可以呢?什么时候用in和什么时候at呢 连词 和介词的用法连词 and, but, because ,although, so . 介词in at on under above around into upon . 谁能分别举出例句呢.我想更细的了解它们的用法.细细地讲解下.好么?谢谢. look around是什么意思那么look for和look around有什么区别？Could you ________Mary for me tonight?( )A look for B look at C look after D look around leave sth somewhere,为什么here和home都是地点副词,home却要加介词?如left my book at home 又如left it here,为什么home前面要家介词at? just turn up around dinner time请问这里的around是什么词性,是“大约在晚饭时间”的意思吗?可around当“大约”讲时,是副词,感觉是不是像 at night 的at 一样是介词啊? 关于英语介词in 和at 的疑问两个句子I live at 49 Fumin Street.It is in Yunnan Street.为什么两条都是街,第一个句子要用at 而第二个要用in 英语介词练习题在什么情况用for和at 求in at on 等介词的用法和区别 时间介词in on at的用法和例句 school的介词用什么?好象有at 和in