請教英文句型的問題?
 

It is your negative learning attitude that fails you in the examination.
It is because you are kind that I like you.
It is strange that he did not show up.
請問前兩句都是形容詞子句嗎?第三句應為名詞子句 那如何分別這三句的差異呢?

感謝指教~