を
(O)
marks the direct object of a transitive verb.
Connection rules
- +Noun + を + transitive verb
- +Always written with を, pronounced 'o'.
- +Also marks the path of motion verbs: 公園を散歩する ('walk through the park'), 道を渡る ('cross the road').
Examples
1.
本を読みます。

Hon o yomi masu.
I read a book.
「marks the direct object of a transitive verb」
2.
水を飲みます。

Mizu o nomi masu.
I drink water.
「marks the direct object of a transitive verb」
Practice
I drink coffee every morning.
毎朝、___飲みます。
Romaji also accepted