Why is a just a rather odd wh -word. Its distribution is very limited -- it can only have the word reason as its antecedent, and since it's never the subject it's always deletable. Consequently it behaves strangely, as you and others point out.

11 Why is it that everybody wants to help me whenever I need someone's help? Why does everybody want to help me whenever I need someone's help? Can you please explain to me the difference in meaning between these two questions? I don't see it.

She should have got there by now because she took the first train. 彼女は 始発 に 乗った から 今ごろ そこに 着 いてい る はずだ He should have finished the task by noon. 彼は 昼ま でにはその 仕事 を 終 え ている はずだ (正午 以前の 発話 であれば, 誤解 の 余地 がな いため に, このように 未来完了 的な 解釈 ...

You should watch it. 例文帳に追加 観たほうがいいよ。 - Weblio Email例文集 Things that should be learned. 例文帳に追加 学ぶべきもの。 - Weblio Email例文集 I should sleep. 例文帳に追加 私は帰るべきだ。 - Weblio Email例文集 What should I do? 例文帳に追加 どうしたらいいの - Weblio ...

「I should like to」のお隣キーワード I should improve my English skill so that I can speak English more fluently. I should know more about that. I should learn from him. I should learn from how you always take care of your health I should leave a blank here. I should like I should like to I should like to call on you this evening.