1.在午夜，用介词：at；2.午夜前，用介词：before；3.午夜后，用介词：after,beyond；4.一直到午夜，用介词：until(also:till)。
midnight用什么介词
1.在午夜,用介词:at
at midnight.
We pulled in at midnight.
我们午夜抵达
That shop closed at midnight.
那家商店营业到午夜十二点.
2.午夜前,用介词:before
before midnight.
3.午夜后,用介词:after,beyond
after midnight.
beyond midnight.
午夜之后
4.一直到午夜,用介词:until(also:till)
They talk on until midnight.
他们继续谈话直到半夜.