def getNextRootCommonPattern(position, tone, lastcondition, phon1, phon2, phon3
    ):
    """ this corresponds to the most common pattern for roots: phon1 at the beginning
            of high-toned words, phon2 at the beginning of low-tones words, phon1 after
            some consonnants (if lastcondition is met), and phon3 otherwise"""
    if position == 1:
        return tone == '+' and phon1 or phon2
    return lastcondition and phon1 or phon3
