か
(Ka)
marks a sentence as a question.
Connection rules
- +Statement in polite form + か
- +In casual speech か is typically replaced by rising intonation alone.
- +Embedded questions use か at the end of the embedded clause.
Examples
1.
これは何ですか。

Kore wa nani desu ka.
What is this?
「marks a sentence as a question」
2.
日本語が分かりますか。

Nihongo ga wakari masu ka.
Do you understand Japanese?
「marks a sentence as a question」
Practice
Where is the toilet? (polite question)
トイレは___。
Romaji also accepted