while
/ˈwaɪl/KK
1.
當……的時候；在……期間
用來連接兩個同時發生或持續的動作、事件或狀態。
用法：描述過去同時進行的動作時，常與過去進行式搭配，但不是必要條件。
I listened to music while I was riding the bus to school.
我搭公車上學時聽音樂。
Please keep your voice down while your sister is sleeping.
你姊姊睡覺時，請小聲一點。
2.
然而；可是；相較之下
用來對照兩項不同的事實、情況或偏好。
用法：可用來連接兩個完整子句。正式書寫中，常用來清楚比較兩件事。
My dad likes strong coffee, while my mom usually chooses tea.
我爸爸喜歡濃咖啡，相較之下，我媽媽通常選茶。
Some students take the bus to school, while others ride bikes.
有些學生搭公車上學，而其他學生騎腳踏車。
3.
雖然；儘管
用來承認某個事實，再提出與該事實形成反差的結果或觀點。
用法：當它表示「雖然」時，主要子句通常不再加表示轉折的連接詞，以免重複。
While the restaurant is a little expensive, the food is fresh and delicious.
雖然那家餐廳有點貴，但食物新鮮又好吃。
While I understand your worry, I think we should wait and learn more.
雖然我了解你的擔心，但我想我們應該等一等，再多了解一些。
常見錯誤
While it was raining, but we still went to the night market.
While it was raining, we still went to the night market.
While I was doing my homework, my brother was played video games.
While I was doing my homework, my brother was playing video games.
I stayed at home while two hours.
I stayed at home for two hours.
During I was waiting for the bus, it started to rain.
While I was waiting for the bus, it started to rain.
相關字詞
學習提示
・本字最常見的兩種意思是「當……的時候」與「相較之下」。閱讀時可先判斷前後是否在談同一段時間。
・若後面接的是名詞而非完整子句，通常應改用表示「在……期間」的介系詞。
・表示「一段時間」時，要和作副詞的相近拼法區分；前者通常可搭配冠詞，後者通常直接修飾動詞。