13．I can't find my key．Itmust have been left in my office．（leave）
我找不到我的鑰匙，它肯定是忘在我的辦公室了．

分析 我找不到我的鑰匙，它肯定是忘在我的辦公室了．

解答 答案：must have been left
肯定：must；把某物忘在某地：leave sth+介詞短語表示地點；句中l(wèi)eave與主語it之間構成動賓關系，要用被動；句意表達的是推測，對過去的推測要用情態(tài)動詞加完成時態(tài)來構成．

點評 翻譯題在解題是首先要確定好句子的時態(tài)，然后要把握好短語表達，最后要注意句子結構．

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