How do you translate preposition 'in" in sentences like: His life is in danger. You're in good health.

Adverbs?
In that case, you can say 'an'

His life is in danger.
He's living unsafely
Lavi li an danje.


I'm in good health.
I'm healthy
M'an bòn sante.


You're in good health.
You're healthy
Ou an bòn sante.


They got married secretly
Yo marye an sekrè.