大家好
最近看一本文法書，裡面寫到
it doesn't matter只能放句首，然後加名詞子句
書中例句:
(O) It doesn't matter how he passed it.
(X) How he passed it doesn't matter.
(O) It doesn't matter whether he likes it or not.
(X) Whether he likes it or not doesn't matter.
可是我在其他書上看到這樣的句子:
Whatever happened to Jack doesn't matter. We should go find him now.
可是上面這個句子前方的Whatever happened to Jack的確是名詞子句
為什麼他可以這樣用呢? 還是說根本就沒有it doesn't matter只能放句首的用法?
麻煩請各位大大開釋，謝謝!