14．You are going to write a letter to the President of south Africa asking him to free Mandea．
Youare towrite a letter to the president of South Africa tolet Mandelafree．

分析 你將寫一封信給南非總統(tǒng)，讓他釋放 Mandela．

解答 答案：are to，let，free 考查句型轉(zhuǎn)換．be going to do結(jié)構(gòu)表示一般將來時態(tài)，可以轉(zhuǎn)換成be to do結(jié)構(gòu)表示一般將來時態(tài)．a(chǎn)sk sb．to free sb（此處free是動詞）可以轉(zhuǎn)換成let sb．free（此處free是形容詞）．

點評 同義句型轉(zhuǎn)換，是把意思相同或相近的句子用不同的詞匯、短語及句型表示出來．同義句的相互轉(zhuǎn)換除了考查主動句與被動句，復(fù)合句與簡單句之間的轉(zhuǎn)換，直接引語變間接引語外，還有一些詞或短語的替換，僅僅通過替換幾個詞或短語，而使句子意思不變，就能達到異曲同工之妙．"句型轉(zhuǎn)換"題是用來考查學(xué)生對句子結(jié)構(gòu)變化所掌握的程度．

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