1. He is an early bird.

2. He is a morning person.
(Are both the same in meaing, right?)

3. She is a late bird.
4. She is an evening person.
5. She is a night person.
(What about these sentences? Can they be the opposite of #1 or #2? Do you have some other expressions?)

1 could mean simply that he is early getting to school or work, whether he wants to or not! 2 definitely means he functions much better in the mornings than later in the day.

In place of 3, I'd write "She is a night owl." 4 and 5 are fine!

1. "He is an early bird" means that he is someone who wakes up early in the morning and is most active and productive during the early hours of the day.

2. "He is a morning person" has a similar meaning and refers to someone who naturally feels more alert and energetic during the morning hours.

Both sentences convey the same idea, emphasizing the person's preference for and productivity during the early part of the day.

3. "She is a late bird," is not a common expression in English. The opposite of an early bird is usually not referred to as a "late bird" but as a "night owl," indicating that the person stays awake and more active during the night hours.

4. "She is an evening person" doesn't necessarily convey the same meaning as being an early bird. It typically refers to someone who feels more alive and productive during the evening hours rather than early in the morning.

5. "She is a night person" or "She is a night owl" means that she prefers to stay up late at night and is most active during those hours. This is often the opposite of being an early bird.

To summarize:
- "Early bird" and "morning person" refer to someone who is most active and productive in the early part of the day.
- "Night person" and "night owl" refer to someone who is most active and productive during the night hours.