求用英语表示时间所要加的介词和询问星期几 几月几号等句型

1,what's the date today?今天是几号?
2,what day is it?今天是哪一天?/今天是几号?
3,what's the time?几点了?
4,what time is it?几点了?

1和2同义,3和4同义.

在几点钟用介词at, at six在六点钟
在早上、中午、晚上用介词in, in the morning/afternoon/evening, 在晚上还可用at night
询问星期几用句型what day is it today?
如果询问日期就用what's the date today?