彼らがいつやってくるかわからない。

Sentence Analyzer

彼ら いつ やってくる わからない

English Translation

There is no telling when they will come.

Furigana

(かれ)らがいつやってくるかわからない。

Romanji

Karera ga itsu yattekuru ka wakaranai.

Words

彼ら (かれら)
they (usually male); them
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
何時 (いつ)
when; how soon
やって来る (やってくる)
to come along; to come around; to turn up; to arrive at the present; to get where one is; to have been doing something (for a period of time)
()
indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way
分かる (わかる)
to understand; to comprehend; to grasp; to see; to get; to follow; to become clear; to be known; to be discovered; to be realized; to be realised; to be found out

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the