这是92年的考研真题中的句子If this warming up took place,the ice caps in the poles would begin to

题目

这是92年的考研真题中的句子If this warming up took place,the ice caps in the poles would begin to
melt ,thus raising sea level several meters and severely flooding coastal cities.此句的前一句是According to a weather expert's prediction ,the atmosphere will be 3摄氏度 warmer in the year 2050 than it is today ,if man continues to burn fuels at the present state.if引导的条件句是虚拟语气吗?this指代的是state吗?thus引导的部分没看懂,主语是什么呢?能帮我分析下句子的主干是什么吗?英语不好请大家帮帮我!

答案

1 if引导的是对将来虚拟的虚拟语气.
2 this这里只是单纯的指示代词,this warming up共同指代 present state
3 句子的主干分析
主语 the ice caps in the poles （极地的冰盖）
谓语 would begin
宾语 to melt
状语 if从句（从句中,主语是warming up,谓语是take place）
4 thus 引导的是结果状语从句 翻译成“其结果就是.”
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