時間があれば電話します。

時間があれば電話します。

I will call you up, provided that I have time.

時間(じかん)があれば電話(でんわ)します。

Jikan ga areba denwashimasu.

時間 (じかん)

time; hours

が (が)

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

有る (ある)

to be (usu. of inanimate objects); to exist; to live; to have; to be located; to be equipped with; to happen; to come about

電話 (でんわ)

telephone call; phone call; telephone (device); phone

Readings: ジ、とき、 -どき

Meanings: time, hour

Readings: カン、ケン、あいだ、ま、あい

Meanings: interval, space

Reading: デン

Meaning: electricity

Readings: ワ、はな.す、はなし

Meanings: tale, talk