21.   Then he complains when she begins to behave like a very naughty child.

22.   They were behaving like naughty schoolgirls.

23.   This would make you less likely to behave like this in similar circumstances in the future.

24.   To stop the turntable behaving like a seismograph, it is suspended on isolating springs.

25.   We have learnt that, according to quantum mechanics, even a single particle must behave like a wave all by itself.

26.   You might say she behaved like a perfect gentleman.

27.   She knows how to behave like a lady.

28.   What has got into you today?

29.   Why are you behaving like this?