题目内容
20．大多数地球表面是被水覆盖的．Most of the earth's surface is covered by water．．分析 Most of the earth's surface is covered by water．
解答 答案：Most of the earth's surface is covered by water．
由汉语中的"被水覆盖"判断用被动语态，时态可选用一般现在时．一般现在时被动语态的构成为：主语+am/is/are+动词的过去分词．主语为surface为单数，故用is；本句的关键短语是"被水覆盖"be covered by 以及"大多数…"most of，；另外翻译"地球表面"时要用earth的名词所有格形式earth's．故答案为：Most of the earth's surface is covered by water．
点评 翻译句子时要先判断使用何种时态，并正确判断使用主动语态还是被动语态，另外注意正确拼写句中所用到的重点短语或单词．
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