- Time - after, as soon as, until, whenever
- Comparison - rather than, than, whether
- Concession - though, although, even though
- Relative Pronoun - who, whoever, whose, whom
- Condition - if, only if, unless, provided that
- Reason - because, since, so that, in order to
- Relative Adjective - that, whatever, which
- Manner - how, as though, as if
- Place - where, wherever
