这是为什么英语

“It is too big and hard work”这是因为作业量太大且太难“This is why”这是为什么

Why,这个应该就是为什么的英文单词，如果你想问别人为什么就可以发这个。

why? --Because the homework is too much and too difficlut./Because there is too much homework and it's too hard.

Why?Due to how difficult the assignment is!

but why

Why?就可以吧，中英文翻译有时是很活的。

最简短的是 Why? 根据语境可能有别的说法。比如：Why is that? How come? 等等。