他为什么不

why doesn't he

→ 他
phrase Uncommon #12,891
why doesn't he This phrase begins a question asking why he does not do something; it is followed by a verb. Depending on context, it can also mean “why didn't he.”
CH: 他为什么不吃早餐?
EN: Why doesn't he eat breakfast?

他为什么不长高了?

Why isn't he getting any taller?

— 铁皮鼓 (1979)

他为什么不打给我

Why doesn't he call me?

— 利维坦 (2014)

汤姆昨天告诉你他为什么不去学校了吗?

Did Tom tell you yesterday why he wasn't going to school?

你知道他为什么不醒来?

Do you know why he won’t wake up?

— 穆那大哥做医生 (2003)

他为什么不把温迪也带去?

Why didn't he take Wendy with him too?

— 孤堡惊情 (2007)

他为什么不出来?

Why isn't he coming out?

— 爱情是狗娘 (2000)

他为什么不爱我

Why doesn't he love me?

— 几近成名 (2000)

他为什么不受欢迎

Why isn’t he popular?

— 月升王国 (2012)

他为什么不让我去呢

Why won't he let me go?

— 帝国的毁灭 (2004)

他为什么不回来?

Why isn’t he coming back?