5．-When is he willing to lend his friends some money？
-Only when ______ hard enough．（　　）
A．to pressB．pressedC．pressingD．is pressed

分析 --他什么時(shí)候愿意借給朋友一些錢呢？
--只有在他受的壓力足夠大的時(shí)候．

解答 答案：B．
本題的回答為省略句，其完整的句子應(yīng)為"He is willing to lend his friends some money when he is pressed hard enough．"因主句和從句主語一致，且從句謂語動(dòng)詞是be動(dòng)詞，所以從句中的主語和be動(dòng)詞可同時(shí)省略，動(dòng)詞press與它的邏輯主語he之間又是被動(dòng)關(guān)系，所以用過去分詞pressed，故選B．

點(diǎn)評(píng) 本題考察的是狀語從句的省略，當(dāng)狀語從句的主語和主句主語一致，且含有be動(dòng)詞的時(shí)候，可以把狀語從句的主語和be動(dòng)詞一起省略．到底用現(xiàn)在分詞還是過去分詞，看動(dòng)詞與它的邏輯主語之間的關(guān)系（主句的主語就是非謂語動(dòng)詞的邏輯主語），即主被動(dòng)關(guān)系（主動(dòng)關(guān)系就用現(xiàn)在分詞形式；被動(dòng)關(guān)系就用過去分詞）．

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