我们经常听到他们在夜半唱歌的翻译：We often heard them singing in the midnight 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

We often hear them singing in the middle of the night

We often heard them singing in the midnight

We hear them to sing frequently in the midnight

We often hear them sing in the wee hours

We often heard them singing in the midnight