somewhere

TakaThe book in hand interprets the part in bold as 'a train to a certain destination.' Is that interpretation really possible?

I'm not entirely sure what you are asking. If this doesn't help please clarify.

The narrator has stated his intention to catch a train but has not specified a particular destination. Either he doesn't want the reader to know

I think "to catch a train somewhere" mean to take a train to some place and not to get on a train which the speaker has no idea where the train will be. So, I agree with your interpretation that somewhere means some unknown destination, either irrelevant or remained hidden.

RayHThe narrator has stated his intention to catch a train but has not specified a particular destination.

How come 'catch something somewhere' means that way? Doesn't 'to cathch something somewhere (somewhere=adverb)' mean 'to get something at/in some place'?

Ah, I see the confusion.

You're reading it as "somewhere at the station, he was going to catch a train" the way we use "it's around here somewhere" or "Keep looking, you're sure to find it somewhere."

We also use "somewhere" like this though: "So, I was in the car, going somewhere with my family, and all of the sudden..." or "I was going to catch a train somewhere..." -- it just

Grammar GeekWe also use "somewhere" like this though: "So, I was in the car, going somewhere with my family, and all of the sudden..."
(There's also a song lyric: "He took a midnight train going anywhere."...)

If it was 'catch the train going somewhere', I wouldn't be confused at all. I mean, grammatically, 'somewhere' is an adverb, right? Is it poss

I haven't thought about this before, but it seems that "somewhere" is like "home."

I take the express train to work, but I have to take a local train home. I was taking the train somewhere.

 So it's like you don't say 'return to home' or 'on my way to home' but you say 'return home' or 'on my way home'
...but wait a minute, isn't 'go to somewhere' or 'a train to somewhere' also acceptable? 

I have to [go / catch a train / take the bus / drive] to [somewhere / home] this afternoon.
The implied to undergoes "obligatory deletion". *
The same is true of the related anywhere.

Have you ever taken a train anywhere?
I've never taken a plane anywhere.
With some imagination, you could probably make simialr exa