是否的英文：
whether (or not)
if
is or isn't
參考例句：
BRAKES: Are your brakes mushy?
剎車:剎車是否失靈？Is this inference too presumptuous?
這種推論是否太抽象了？Does the writer belong to the Impressionist school?
這位作家是否屬於印象派?There' s some ifs about his suitability for the job.
他是否適合該工作有些疑問. Has operator received pump instruction and operations manual?
操作者是否收到泵說明書和操作手冊?Look through your old clothes and see if you have anything to give away.
翻翻妳的舊衣服，看看是否可以送掉的。Litmus paper can be used as an indicator of the presence of acid in a solution.
石蕊試紙可用以測試溶液是否含酸。Can children under six ride free?
6歲以下兒童是否免費Disputing the country's title to the islands
爭論該國對那些島是否有主權.Please reenter your passwords to confirm they are correct.
請再次輸入密碼，確認是否正確。
whether是什麽意思：
conj. 是否；不管是...（或是）
The moon is a moon whether it shines or not
或名或暗,月亮總是月亮Whether to go or not is up to you.
去還是留由妳自己決定。It is questionable whether it is true.
它是否真實值得懷疑。 The key element in whether scientific evidence is admissible is whether it is trustworthy.
isn是什麽意思：
internal statement number [計] 內碼
That book isn't mine.
那本書不是我的。Money isn't everything
錢不是萬能的It isn't the crack of doom.
還不是世界末日。 Boy! Isn't it hot!
哇，好熱啊！“Stop!” isn't an imperative.