床が揺れるのを感じた。

bed; bedding; sickbed; alcove; riverbed; seedbed; straw "core" of a tatami mat; floor

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

to shake; to sway

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to feel; to sense; to experience