メアリーはテニスが上手だと信じられている。

It is believed that Mary is good at tennis.

メアリーはテニスが上手(じょうず)だと信(しん)じられている。

Meari- wa tenisu ga jōzu da to shinjirareteiru.

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

テニス (テニス)

tennis

が (が)

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

上手 (じょうず、じょうて、じょうしゅ)

skill; skillful; dexterity; flattery

だ (だ)

be; is; indicates past or completed action; indicates light imperative

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

信じる (しんじる)

to believe; to believe in; to place trust in; to confide in; to have faith in

Readings: ジョウ、ショウ、シャン、うえ、 -うえ、うわ-、かみ、あ.げる、 -あ.げる、あ.がる、 -あ.がる、あ.がり、 -あ.がり、のぼ.る、のぼ.り、のぼ.せる、のぼ.す、よ.す

Meanings: above, up

Readings: シュ、ズ、て、て-、 -て、た-

Meaning: hand

Reading: シン

Meanings: faith, truth, fidelity, trust