it looks as if it is going to rain.这里为什么要加it?
问题描述：
it looks as if it is going to rain.这里为什么要加it?
答
it (这个it 是个功能词汇,没有意思,结构的需要) looks as if it(这个it 是表天气) is going to rain
it looks as if it is going to rain.这里为什么要加it?
it (这个it 是个功能词汇,没有意思,结构的需要) looks as if it(这个it 是表天气) is going to rain