(V/い/な/N ~~だ~~)かどうか, -
文法の解説は英語です。
用法
Sentence pattern for when using a question that includes a question word
例文
忘年会に出席するかどうか、二十日まで返事をください
Please reply by the 20th about whether you will attend the year-end party or not
間違いがないかどうか、調べてください
Please check wether or not there are any mistakes