Halliday & Matthiessen (2014: 475):
The non-finite clause is often introduced by a preposition or preposition group functioning conjunctively, e.g. besides, apart from, instead of, other than, without; for example
(a) addition
additive
||| Apart from being amusing || what else does The Nun’s Priest’s Tale do? |||
||| Besides being gifted with literary talent, || Amir Khusrau was a musician, too. |||
||| Most families are dependent on two salaries coming into the home, || with women now constituting almost half the country’s workforce. |||
adversative
||| Until we do that, || the opportunities may come and go || without our having a compelling rationale [[ for pushing commitment and action]] . |||
||| The arrow changed its course || and fell to the ground || without harming anyone. |||
(b) variation
replacive
||| Instead of finding the perpetrators, || they criminally charged the Earth First! activist, || who was left crippled for life. |||
subtractive
||| We call him a murderer, || but for him there is no way out || other than doing the deed. |||