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(yǔ)表示地點(diǎn)；句中l(wèi)eave與主語(yǔ)it之間構(gòu)成動(dòng)賓關(guān)系，要用被動(dòng)；句意表達(dá)的是推測(cè)，對(duì)過(guò)去的推測(cè)要用情態(tài)動(dòng)詞加完成時(shí)態(tài)來(lái)構(gòu)成．

點(diǎn)評(píng) 翻譯題在解題是首先要確定好句子的時(shí)態(tài)，然后要把握好短語(yǔ)表達(dá)，最后要注意句子結(jié)構(gòu)．

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