～かどうか (〜ka dou ka)
Explanation
Used to express 'whether' or 'if' in indirect questions or statements.
Formation
Verb-casual + かどうか, い-Adjective + かどうか, な-Adjective + (だ)かどうか, Noun + (だ)かどうか
Detailed Explanation
The ～かどうか grammar point is used to express 'whether' or 'if' in indirect questions or statements. It is often used to express uncertainty or to inquire about information in a more polite form. ～かどうか can be used with verbs, い-adjectives, な-adjectives, and nouns.
Examples
彼が来るかどうか知りません。
Kare ga kuru ka dou ka shirimasen.
I don't know if he will come or not.
この本が面白いかどうか教えてください。
Kono hon ga omoshiroi ka dou ka oshiete kudasai.
Please tell me if this book is interesting or not.
彼女が綺麗だかどうかは分かりません。
Kanojo ga kirei da ka dou ka wa wakarimasen.
I don't know whether she is beautiful or not.
彼が先生だかどうか覚えていません。
Kare ga sensei da ka dou ka oboete imasen.
I don't remember if he is a teacher or not.
Grammar content sourced from hanabira.org.