That is because…句型

“That is because…”句型中從屬連詞because引導的名詞性從句在此作表語， 這也是個常用句型， 意爲“這就是爲什麼……/因爲……”。 例如：

He did not see the film last night. That is because he had to help his little sister with her homework. 昨天晚上他沒有去看電影， 那是因爲他得幫助他的妹妹做作業(yè)。 (第一句話說明結果， 第二句話說明原因)