I work better in the morning than in the afternoon.我上午的工作效率比下午高。

I often stayed up until two or three in the morning.我常常熬夜到凌晨两三点。

He'll phone back in the morning.他会在上午回电话。

Melanie promised that she would call them in the morning.梅勒妮承诺早上给他们打电话。

at 7 o'clock in the morning早上7点

See you in the morning!明早见！(晚上离别时或上床睡觉前说的话)in the early hours of the morning在凌晨；在清晨

The attack happened in the early hours of the morning.袭击发生在凌晨。