of how引導什么從句

　　Keep a tally of how much you spend while you're away.

　　在外出期間，把你的花費都記錄下來。

　　This dictionary has many examples of how words are used.

　　這部詞典有許多關于詞語用法的示例。

　　That is a measure of how bad things have become at the bank.

　　那就是銀行的局面已經糟糕到何種程度的衡量標準。