Taka  +  532952 Thu, 26 Jun 08 03:58 PM Even when you live in a city, you have to walk: you have to walk from the station to your destination or when to change trains.   About the part in bold, I think what the author is trying to say is 'when you change trains', but is that 'when to' grammatically acceptable? Taka Joined on Tue, Sep 7 2004 Japan Senior Member 2,625

	Philip  +  532968 Thu, 26 Jun 08 04:19 PM Yes, your interpretation is right; no, it isn't grammatically acceptable. [...to your desination or to the transfer station.] Philip Joined on Thu, Jun 23 2005 Veteran Member 8,726 At reise er at leve! - H. C. Andersen

	CalifJim  +  533091 Thu, 26 Jun 08 10:28 PM Taka “I think what the author is trying to say is 'when you change trains',” Yes, that's most likely the intent. Taka “but is that 'when to' grammatically acceptable?” Not here.  No.  when to clauses are indirect questions, hence, they function as noun phrases: I didn't know when to change trains. Be sure to tell him when to change trains. They don't function as adverbs: *You have to walk when to change trains. *Be sure to read the posted signs when to change trains. CJ    CalifJim Joined on Mon, Aug 2 2004 California Veteran Member 22,379 "There are no facts, only interpretations" - Nietzsche Verbs, Clauses, Nouns, Adverbs, Noun Phrases, Indirect Questions, Direct Questions

	Taka  +  533179 Fri, 27 Jun 08 04:36 AM  I thought not. Thank you both! Can I ask something related to that matter? Would you native speakers use 'wh~ to/how to' as a subject of a sentence?   What to do is a problem. Taka

	CalifJim  +  533185 Fri, 27 Jun 08 04:50 AM Taka “'wh~ to/how to' as a subject ” Yes.  No problem. How to prune roses is the topic of the lecture. When to start the academic year was a matter of great debate. Where to put the suitcases became the main concern when we realized there were hundreds of them.  CJ  CalifJim

	Taka  +  533406 Fri, 27 Jun 08 05:08 PM One of the books I have says 'wh~ to/how to' is rarely used as a subject, so I was wondiering if it was that rare. You don't think it's rare, Jim? Taka

	CalifJim  +  533433 Fri, 27 Jun 08 06:35 PM I suppose if you consider the millions upon millions of sentences in English, there aren't many with that stucture as subject, so it's rare.  It seems to me that it can only occur comfortably with a linking verb, so that also limits its usage. CJ  CalifJim Verbs