教室の机をきちんとならべなさい。

classroom; department; laboratory; single-room school; small school

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

desk

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.

precisely; accurately; neatly

to line up; to set up; to arrange in a line; to enumerate; to itemize; to be equal (to); to compare well (with); to be as good (as)

to do