She couldn't understand why he was so angry all of a sudden.
她不明白为什么他突然这么生气。
I often wonder why the stars shine so brightly at night.
我常常想为什么星星在晚上如此明亮地闪耀。
He asked himself why he had made such a foolish decision.
他问自己为什么做出了如此愚蠢的决定。
We are curious about why the leaves change color in autumn.
我们很好奇为什么树叶在秋天会变色。
She ponders why people are so mean to each other sometimes.
她思考为什么人们有时对彼此如此刻薄。
I can't figure out why my computer is running so slowly.
我弄不明白为什么我的电脑运行得这么慢。
He wants to know why she didn't show up at the party.
他想知道为什么她没有在聚会上出现。
We wonder why the birds are singing so cheerfully today.
我们想知道为什么鸟儿今天唱得如此欢快。
She asks why the sky is blue on a clear day.
她问为什么在晴朗的日子里天空是蓝色的。
I am puzzled by why he likes that boring movie so much.
我很困惑为什么他那么喜欢那部无聊的电影。
why bother 何必
why on earth 究竟为什么
why so serious 为什么这么认真
why the long face 为什么闷闷不乐
why wait 为什么要等
