ルーシーは箸が使えない。

ルーシーは箸が使えない。

Lucy cannot use chopsticks.

ルーシーは箸(はし)が使(つか)えない。

Ru-Shi- wa hashi ga tsukaenai.

は (は)

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

箸 (はし)

chopsticks

が (が)

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

使える (つかえる)

to be usable; to be serviceable; to be useful

Readings: チョ、チャク、はし

Meaning: chopsticks

Readings: シ、つか.う、つか.い、 -つか.い、 -づか.い

Meanings: use, send on a mission, order, messenger, envoy, ambassador, cause