1.   Aggression, personal attacks and criticism, behaving like a petulant child.

2.   Behave like everyone else.

3.   But a duck always behaves like a duck, whatever his social conditioning, upbringing or training!

4.   But whether a significant proportion actually behave like Yuppies is another matter.

5.   He knew he was behaving like a lovesick teenager.

6.   He was able to write his name, but in all other respects he behaved like an infant.

7.   He was behaving like a character in a Victorian melodrama.

8.   I had not yet recovered from the simple shock of finding that many of them talked and behaved exactly like us.