搜狗做题网The world population is rising so quickly that the world has
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The world population is rising so quickly that the world has become too crowded.请问crowded
是过去完成时吗?为什么不用一般现在时
The world has become too crowded.是现在完成时吗？为什么不用一般现在时？
是过去完成时吗?为什么不用一般现在时
The world has become too crowded.是现在完成时吗？为什么不用一般现在时？
ecome 是表示变化的连系动词,意思是“变得”,后接的crowded 是过去分词作形容词用.世界人口正在急剧增长,世界已经变得过分拥挤了.说话的时间立足点是现在,根据这个意思就必须使用现在完成时态.所以有了这个句子：The world population is rising so quickly that the world has become too crowded.
我们也可以说：世界人口正在急剧增长,世界正在变得越来越拥挤了.说话的时间立足点还是现在,根据这个意思我们就必须使用现在进行时态：The world population is rising so quickly that the world is becoming more and more crowded / is becoming increasingly crowded.
我们也可以说：世界人口正在急剧增长,世界正在变得越来越拥挤了.说话的时间立足点还是现在,根据这个意思我们就必须使用现在进行时态：The world population is rising so quickly that the world is becoming more and more crowded / is becoming increasingly crowded.
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