彼がそれほど落ち込んでいるとは思えないな。

I can't believe that he is that depressed.

彼(かれ)がそれほど落(お)ち込(こ)んでいるとは思(おも)えないな。

Kare ga sorehodo ochikondeiru to wa omoenai na.

彼 (かれ)

he; him; his; boyfriend

が (が)

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

それ程 (それほど)

to that degree; extent

落ち込む (おちこむ)

to feel down (sad); to be in a slump (e.g. business, economy); to be in an unfavourable condition; to fall into (e.g. a hole)

と (と)

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

は (は)

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

思える (おもえる)

to seem; to appear likely

な (な)

(sentence end, mainly masc.) indicates emotion or emphasis; (used with masu stem verb) command; (used with dictionary form verb) prohibition

Readings: ヒ、かれ、かの、か.の

Meanings: he, that, the

Readings: ラク、お.ちる、お.ち、お.とす

Meanings: fall, drop, come down, village, hamlet

Readings: -こ.む、こ.む、こ.み、 -こ.み、こ.める

Meanings: crowded, mixture, in bulk, included, (kokuji)

Readings: シ、おも.う、おもえら.く、おぼ.す

Meaning: think