The sound "Zh" in some cases, indicated by the letter "g". In this case, after a consonant must follow the vowels from the list: “i”, “e”, “y”. To read in such cases, the letter will be like a soft "j."
Similarly read a sound of the letter “j”, but for recording specific sound she almost never used. Its scope – the words borrowed from Latin (in old Saxon it is not).
The digraph "zh" is fully consistent with the Russian sound of "W" and is used only in borrowed words: Zhukovsky, Zhenya, Zheleznogorsk.