I find the passive construction quite fun to use. However I had not come across the use of a reflexive construction instead of the passive before. The reflexive constructions sound very unusual to my native english ear. For example:
Der Schlüssel wird sich sicher noch finden
Der Schlüssel wird sicher noch gefunden werden
Das Buch liest sich schnell
Das Buch kann schnell gelesen werden
Are the reflexive constructions used commonly in everyday speech? Or is my library book (2003) too outdated? I'd definitely struggle to understand the reflexive construction, and would probably think someone had said to me that their book can read fast.
The other difficulty for me would be recognising it's tense. They sound like the the present (e.g. wird finden = will find) but can future tenses like that simply be created just by turning it reflexive?
For example could I just say for "My email will be sent tomorrow"
Meine Email wird sich morgen schicken?