'if or is' (Excuse me but do you know 'if or is' this train is going to London.)

[Ganesh]

Sentence:

Mrs. Ashton: Excuse me but do you know 'if or is' this train is going to London.

Many thanks

[Maryann]

In the sentence above you should use "if", because using "is" twice at the same time makes no sense of the sentence. Besides I think that it would be correct to say "Excuse me but do you know if this train leaves (is leaving) for London."

Maryann

[Cerberus™]

[Maryann]

To my understanding, Steven, if the train was on his way to London we could say "the train is going to London". If we mean its direction it should be said "the train leaves for London". Of course I might be wrong, so could you give me any explanation as to this?

Maryann

P.S. Are you a native speaker?