题目内容
18.Look!It's so cloudy.I think itis going to rain(rain).分析 看!天这么阴,我想天要下雨了.
解答 答案:is going to rain 考查单词填空.根据题干中的look可知时态是一般现在时,结合句意我想天要下雨了还没有发生,要用一般将来时完成句子:构成是"shall(第一人称),will(第二、三人称)+动词原形构成"或"be going to+动词原形"It's going to rain.表示"(有某种迹象)要下雨了."; 而 It will rain.则不能表示有某种迹象,一般用于表示"(收音机或电视天气预报)将要下雨."主语是it,系动词用is,故答案是is going to rain.
点评 解答此题的关键是根据语境推测要填内容表达的含义,然后能理解各选项内容,有时可能没有必要细细区分每个单词的含义,仅根据句子语气就可以判断出正确答案.
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