题目内容
4.Shopping on the Internet,when properly ________,can save us a lot of time and money.( )A. | having done | B. | to be done | C. | doing | D. | done |
分析 当做得恰当时,网上购物能够节约我们许多时间和钱.
解答 答案是D.本题考查"连词+分词"的结构."连词+分词"的结构在句中往往做状语,属于分词做状语;分词做状语时分词的选择是看分词和句子主语之间的关系:分词和句子主语之间是主谓关系(主动关系),用现在分词;分词和句子主语之间是动宾关系(被动关系),用过去分词;本题中连词when后的do 和句子主语shopping on the Internet之间是动宾关系,所以答案选择D.
点评 在非谓语动词的解题中要在掌握其基本用法的基础上关注并积累一些固定用法,结合具体语境做出合理的判断.
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