生徒達が、放課後自分たちの教室を掃除しているのを見て、私はとても驚きました。

Sentence Analyzer

生徒達 放課後 自分たち 教室 掃除している 見て とても 驚きました

English Translation

I was very surprised to see students cleaning their classroom after school.

Furigana

生徒達(せいとたち)が、放課後(ほうかご)自分(じぶん)たちの教室(きょうしつ)掃除(そうじ)しているのを()て、(わたし)はとても(おどろ)きました。

Romanji

Seitotachi ga, hōkago jibuntachi no kyōshitsu o sōjishiteiru no o mite, watashi wa totemo odorokimashita.

Words

()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
放課後 (ほうかご)
after 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
教室 (きょうしつ)
classroom; department; laboratory; single-room school; small school
()
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.
掃除 (そうじ)
cleaning; sweeping; dusting; scrubbing
見る (みる)
to see; to look; to watch; to view; to observe; to look over; to look on; to assess; to examine; to judge; to look after; to keep an eye on; to take care of; to view (e.g. flowers, movie); to try; to try out; to see that...; to find that...
(わたし、わたくし)
I; me; private affairs; personal matter; secrecy; selfishness
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
迚も (とても、とっても)
very; awfully; exceedingly; (not) at all; by no means; simply (cannot)
驚く (おどろく)
to be surprised; to be astonished

Kanji

Readings: セイ、 ショウ、 い.きる、 い.かす、 い.ける、 う.まれる、 うま.れる、 う.まれ、 うまれ、 う.む、 お.う、 は.える、 は.やす、 き、 なま、 なま-、 な.る、 な.す、 む.す、 -う
Meanings: life, genuine, birth
Readings: ト、 いたずら、 あだ
Meanings: on foot, junior, emptiness, vanity, futility, uselessness, ephemeral thing, gang, set, party, people
Readings: タツ、 ダ、 -たち
Meanings: accomplished, reach, arrive, attain
Readings: ホウ、 はな.す、 -っぱな.し、 はな.つ、 はな.れる、 こ.く、 ほう.る
Meanings: set free, release, fire, shoot, emit, banish, liberate
Reading: 
Meanings: chapter, lesson, section, department, division, counter for chapters (of a book)
Readings: ゴ、 コウ、 のち、 うし.ろ、 うしろ、 あと、 おく.れる
Meanings: behind, back, later
Readings: ジ、 シ、 みずか.ら、 おの.ずから、 おの.ずと
Meaning: oneself
Readings: ブン、 フン、 ブ、 わ.ける、 わ.け、 わ.かれる、 わ.かる、 わ.かつ
Meanings: part, minute of time, segment, share, degree, one's lot, duty, understand, know, rate, 1%, chances, shaku/100
Readings: キョウ、 おし.える、 おそ.わる
Meanings: teach, faith, doctrine
Readings: シツ、 むろ
Meanings: room, apartment, chamber, greenhouse, cellar
Readings: ソウ、 シュ、 は.く
Meanings: sweep, brush
Readings: ジョ、 ジ、 のぞ.く、 -よ.け
Meanings: exclude, division (x/3), remove, abolish, cancel, except
Readings: ケン、 み.る、 み.える、 み.せる
Meanings: see, hopes, chances, idea, opinion, look at, visible
Readings: シ、 わたくし、 わたし
Meanings: private, I, me
Readings: キョウ、 おどろ.く、 おどろ.かす
Meanings: wonder, be surprised, frightened, amazed