def _suffix_rules(token, tag='NN'):
    """ Default morphological tagging rules for English, based on word suffixes.
    """
    if isinstance(token, (list, tuple)):
        token, tag = token
    if token.endswith('ing'):
        tag = 'VBG'
    if token.endswith('ly'):
        tag = 'RB'
    if token.endswith('s') and not token.endswith(('is', 'ous', 'ss')):
        tag = 'NNS'
    if token.endswith(('able', 'al', 'ful', 'ible', 'ient', 'ish', 'ive',
        'less', 'tic', 'ous')) or '-' in token:
        tag = 'JJ'
    if token.endswith('ed'):
        tag = 'VBN'
    if token.endswith(('ate', 'ify', 'ise', 'ize')):
        tag = 'VBP'
    return [token, tag]
