at half past seven为什么前面用at而不用on,in,to

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at half past seven为什么前面用at而不用on,in,to
at half past seven为什么前面用at而不用on,in,to

at half past seven为什么前面用at而不用on,in,to
时间前用at

in + 年，月，季节，上下午，晚上
on +具体的某一天及某一天的上下午，晚上
at + 具体的点钟
固定搭配， at night, at noon, at midnight.

具体的终点前是要用at的，at后一般接点或者比较小的地点。
如果是不确定的时间，比如在某个钟点前就可以用by
on一般是用在具体日期的天前面的
而in是用在月和年以及季节前的，也用于以下几种情况
in the morning /in the afternoon /in the evening,但是下面三种情况用at
at mid-day/ at night/...

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the filmbegins at half past seven 翻译 The film begins at half past seven. Tom and Mike meet at half past seven.(对 at half past seven 提问） I'll get up at half past seven.(变为一般疑问句)____you____up at half past seven? i do my homework at half past seven 划线提问画half past seven 为什么7:30是half past seven.而不是at a half past seven half past seven, I go to school at half past seven. 是什么意思 I get up at half past seven .(改为一般疑问句) Shall we s____ at half past seven?---Ok at I past half get up seven.连词成句 At half past seven l c______ a train. Simon has breakfast at half past seven.{对划线部分提问}划线划在at half past seven下 let's meet at half past seven 同义句改成＿＿＿＿＿＿＿＿＿＿＿＿ at half past seven? we should arrive at school at half past seven in the morning 同义句 2句 at half past seven为什么前面用at而不用on,in,to at half past six at half past