"Is this a train?"

Translation: Ez egy vonat?

[TonyWare1]

How do you know whether it is a question "is this" or a statement " this is". Other than intonation?

[Adam.M.C]

If "ez egy vonat" and "ez vonat" are both translations, what's the difference between the two? When should I use "egy"?

[cathddu]

There is no difference, you can use both, and both versions are being used i'd say about equally often in spoken hungarian

[Gezqin]

When we use ez, egy ,a or etc. I am confused a little bit due to prefixes. Thanks.