It should also be noted that cases of conversion were treated
as one hedge rather than two different hedges, like attempt
used as a verb and attempt used as a noun. However, might
and could were treated not as grammatical forms of may
and can but as different hedges. The approach is based on
semantic considerations as can vs could and may vs might
render different meanings. This approach is in line with
many modern English grammars (see, for example, CGE
2006). To sum up, hedge identification and frequency
calculation was based primarily on semantic and functional
criteria.