Imperfective and simple present distinction

[Kazuha Watanabe]

Dear all,

  I am looking for a language which distinguish imperfective and simple
present (in present tense or non-past tense).  I am especially
interested in distinction in stative situations (such as 'I am tall' or
I know the man') It seems that this sort of distinction is more common
in past tense (i.e., past imperfective vs. plain past tense form/general
past tense), but not so common in present tense (or non-past)

  Thank you for your help!

Kazuha Watanabe