、。
Let's go to the morning market tomorrow.
Literal
Tomorrow [topic-は], morning-market [to-に] go-[volitional-こう].
朝市 ('morning market') is a compound noun — 朝 (morning) + 市 (market). 行こう is the plain volitional of 行く — a casual 'let's go.' Japanese morning markets are a cultural experience, especially in rural and tourist areas.