夏休みはどうだった？

夏休みはどうだった？

How was your summer vacation?

夏休(なつやす)みはどうだった？

Natsuyasumi wa dō datta?

夏休み (なつやすみ)

summer vacation; summer holiday

は (は)

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

如何 (どう、いかが、いか)

how; in what way; how about

だ (だ)

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

Readings: カ、ガ、ゲ、なつ

Meaning: summer

Readings: キュウ、やす.む、やす.まる、やす.める

Meanings: rest, day off, retire, sleep