Usage of while

[Rag84dec]

i am going out with my friends.I am sending a mail that they have to bring a pen.
Will this be correct?

Please bring a pen or pencil while coming to the trip.

THanks

[Mister Micawber]

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No; use 'when'. More natural would be for instance: 'Please bring a pen or pencil with you'.
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Native English teacher at Mister Micawber's

[Rag84dec]

PLease tell me how can i say the same thing...

[Mister Micawber]

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Please bring a pen or pencil when you come on the trip.
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_________________
Native English teacher at Mister Micawber's

[Harry Smiith]

[Mister Micawber]

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'Bring' is more appropriate, as the guests are joining the speaker-- note also that they are 'coming' on the trip.
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_________________
Native English teacher at Mister Micawber's

[Harry Smiith]

[Yankee]

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It certainly "sounds English" to me, Harry.

I agree with MM. The verb 'bring' is more appropriate in this case -- for the reasons Mister Micawber noted.
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[Edison_Chen_e_c]

From 'Practical English Usage' by Michael Swan: When/While/As
(Sorry, but I don't have the book now, if there's something wrong please help correct it, thanks very much.)

1.background situation
When/While/As I was walking down the street, I saw Peter drive a Volvo passing by.

2.a period time (usually progressive form)using while/when
While/When I was playing cards, Davied came in.

3.two acting, two continual one (two progressive forms)
While I was having dinner, Mom was watching TV.

4.two simple tense while/when either can be used, yet if what we talk about is about the age or kinda life step, usually using 'when'
I had lunch in the restaurant while/when she studied in the library.
Mary's mother died when she was 12. (speaking of the age)
Mary married a cute guy when she was in London. (speaking of a kind of life step)