Expression: "While she was changing back..."

[Tom]

Hi

Could you please tell me what we do when we come back from a party or some important meeting--I mean, do we:

[Yankee]

Hi Tom

This may be a bit culturally influenced, but I generally would never say that someone 'changed into a casual dress or suit'. In the US, if you say that someone put on a dress or suit, it is generally not understood to be casual wear. Of course, some suits and dresses are more casual than others, but I'd say you'd need to be more specific about precisely what sort of casual dress or suit you're referring to. Otherwise, be less specific and simply say they changed into 'casual clothing'.

The word 'back' usually isn't necessary. I'd probably only use 'back' if the casual clothing was exactly the same clothing that the person had been wearing only a short time before.

[Tom]

Many thanks, Amy.

So how do you find this one? Does it sound natural now?

[Yankee]

Hi Tom

That's OK. I guess I'd like "casual clothes" better. And you could also say "She was changing into something more casual/comfortable when..." In fact, you could also just say "She was changing when ..."
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