Form and rules
How it works
Contrast/concession: although/even though + clause; despite/in spite of + noun/-ing; whereas/while contrast parallel facts.
Reason: because/since/as + clause; because of/due to/owing to + noun phrase, with register differences.
Purpose: to/in order to/so as to + infinitive; so that/in order that + clause.
Result: so + adjective/adverb + that; such + noun phrase + that; therefore/consequently/as a result link larger units.
Choose structure as well as meaning: a linker requiring a noun phrase cannot directly introduce a finite clause without a phrase such as the fact that.