連接副詞：
用來引導主語從句、賓語從句和表語從句，在從句中作狀語。
How I am going to kill the cat is still a question.(我打算怎樣殺死那只貓還是個問題)
That is why everyone is afraid of the tiger.(那就是人人都害怕老虎的原因)
He wondered how he could do it the next day.(他不知道第二天怎樣做那事)
用來引導主語從句、賓語從句和表語從句，在從句中作狀語。
How I am going to kill the cat is still a question.(我打算怎樣殺死那只貓還是個問題)
That is why everyone is afraid of the tiger.(那就是人人都害怕老虎的原因)
He wondered how he could do it the next day.(他不知道第二天怎樣做那事)