君の成績は今学期は平均よりだいぶ下だった。

Sentence Analyzer

成績 学期 平均 より だいぶ だった

English Translation

Your marks were well below average this term.

Furigana

(きみ)成績(せいせき)(こん)学期(がっき)平均(へいきん)よりだいぶ(した)だった。

Romanji

Kimi no seiseki wa kon gakki wa heikin yori daibu shita datta.

Words

(きみ)
you; buddy; pal; monarch; ruler; sovereign; (one's) master
()
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
成績 (せいせき)
results; record; grades; marks
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
(こん)
the current ...; this; today's ...
学期 (がっき)
school term; semester
平均 (へいきん、へいぎん)
average; mean; balance; equilibrium
より (より)
than; from; out of; since; at; on; except; but; other than; more
大分 (だいぶ、だいぶん)
considerably; greatly; a lot
(した)
below; down; under; younger (e.g. daughter); bottom; beneath; underneath; just after; right after; inferiority; one's inferior (i.e. one's junior); trade-in; preliminary; preparatory
()
be; is; indicates past or completed action; indicates light imperative

Kanji

Readings: クン、 きみ、 -ぎみ
Meanings: mister, you, ruler, male name suffix
Readings: セイ、 ジョウ、 な.る、 な.す、 -な.す
Meanings: turn into, become, get, grow, elapse, reach
Reading: セキ
Meanings: exploits, achievements, unreeling cocoons
Readings: コン、 キン、 いま
Meaning: now
Readings: ガク、 まな.ぶ
Meanings: study, learning, science
Readings: キ、 ゴ
Meanings: period, time, date, term
Readings: ヘイ、 ビョウ、 ヒョウ、 たい.ら、 -だいら、 ひら、 ひら-
Meanings: even, flat, peace
Readings: キン、 なら.す
Meanings: level, average
Readings: カ、 ゲ、 した、 しも、 もと、 さ.げる、 さ.がる、 くだ.る、 くだ.り、 くだ.す、 -くだ.す、 くだ.さる、 お.ろす、 お.りる
Meanings: below, down, descend, give, low, inferior