Hi Daniel,

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>
>Does a verb has a different stem for each tense?

In some tenses yes, but some of the time the tenses and moods are expressed with different endings attached to the same stem. Sometimes different tenses of specific verbs use stems originating from different roots altogether, such as with gam- gacch-, or pass- dass-, bhav- as-.

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>Are there analogies in english to it? (Or perhaps in russian?)
>

An analogy to the latter would be the English: goes, went. Here the two tenses not only have different stems (if you can really speak of stems here) but they originate from different words altogether.

I afraid I don't know any Russian apart from the word vodka, which I've been told means 'little water'.

best regards,

/Rett