stand for/fill in for

[GUEST2008]

Hi

Mark's not at work today, who will stand in for him.
Mark's not at work today, who will fill in for him.

--- Do they mean the same thing?

[albeit]

Hi

Mark's not at work today, who will stand in for him.
Mark's not at work today, who will fill in for him.

--- Do they mean the same thing?

'fill in for sb' is, to my mind, the normal neutral while 'stand in for him', which seems to carry connotations of greater responsibility than simply doing Mark's job for the day, isn't what would be used for this situation.

[GUEST2008]

So it's better to say "fill in for" in this case?

So when would you use "stand in for"?

cheers

[albeit]

So it's better to say "fill in for" in this case?

So when would you use "stand in for"?

cheers

As I mentioned, Guest, it holds a feeling of greater responsibility. This might help.

[man who is to give a big presentation to a group of investors phones in sick]

Man: Hello, Boss. I'm in the hospital with a case of appendicitis. I'll be going into surgery after lunch.

Boss: What?! I guess we'll have to cancel the big meeting.

Man: No, don't do that. Brian has agreed to stand in for me. He knows this subject as well as I do. He's been working on this thing with me for a month and I know that he's a better speaker so things should go perfectly.

Boss: Well, if you say so, I'll have to trust you.


===============

And this,

stand in for - idiom
Substitute for, as in He's kindly agreed to stand in for me at the reception. [Early 1900s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


stand in for - meaning

[Barb_D]

Hi

Mark's not at work today, who will stand in for him.
Mark's not at work today, who will fill in for him.

--- Do they mean the same thing?

Aside from your vocabulary question, note that this is a comma slice. You cannot join to independent clauses with a comma.

Mark's not at work today. Who will fill in for him?