What were you doing when the UFO arrived?和I was walking down the street when a UFO landed down.为什么前者是时间状语从句,而后者是并列句,我不太明白希望各位高手给我指点迷津,谢谢了

来源：学生作业帮助网编辑：作业帮时间：2024/05/16 14:02:39

What were you doing when the UFO arrived?和I was walking down the street when a UFO landed down.为什么前者是时间状语从句,而后者是并列句,我不太明白希望各位高手给我指点迷津,谢谢了
What were you doing when the UFO arrived?和I was walking down the street when a UFO landed down.
为什么前者是时间状语从句,而后者是并列句,我不太明白希望各位高手给我指点迷津,谢谢了

What were you doing when the UFO arrived?和I was walking down the street when a UFO landed down.为什么前者是时间状语从句,而后者是并列句,我不太明白希望各位高手给我指点迷津,谢谢了
前句是有特定的时间限制
后句是强调两个动作同时发生,是并列句

我认为前后两句句型是一样的。

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So what were you doing when the UFO （arrived）【到达】。
We don't know who （organize）【组织】the games for the party。
He was one of （the fomous）【最著名】 singers at that time。
When Linda finally saw Davy， he （jumped）【跳】 and （ran）【跑】 with another dog。
Yang Liwei's （fly）【飞行】 around the earth （）【持续】about 22 hours。
She said she （cloud）【能】（sai）【说】 three languages。
He told me he （call）【打电话】 me tomorrow。
I wasn't （）【奇怪】 to find that the best report was from Jim Green，a new student from London。
My Spanish teacher said my （heard）【听力】 was good。
What （happen）【发生】 if they have watched a video at the party？
If I （）【上大学】 to the college，I （will） never（become）【成为】 a soccer player。
When I （walking）【走】 down the street， a UFO （landed）【着陆】right in front of me。
She didn't think about （find）【寻找】 her dog outside the station。
Jack works really （hard）【努力】 in his math this tern。
Mr Li said he saw three aliens （geting out）【出来】 out of the UFO when he walked in a quiet street last night。

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我怎么不觉得后边那句是并列句啊。
不过如果是是并列句的话，那只能说是这两件事情同时发生了。

其实英语学习不需要理解这么多语法的

what were you doing? what you were doing与what were you doing 差别what you were doing原句Do you remember what you were doing?是初二的知识, what were you doing 为什么是were不是what what were you doing _______(昨天晚上） what were you doing yesterday什么时态 what kind of work were you doing? Do you remember what were you doing 还是Do you remember what you were doing 急 what were you doing和whar you were doing的区别书上有what were you dong也有what you were doing,请问区别是什么英语翻译Do you remember what you were doing do you remember what you were doing翻译 Do you remember what you were doing的翻译 what were you doing when he came to see you? what were you doing when you (hear) the news what were you doing this morning还是what are you doing this morning May I ask what you were doing in my restaurant yesterday?were doing 能不能换成did? What were you doing at this time yesterday?怎么回答 What were you doing at eight thirty last night?翻译 What were you doing at this time yesterday morning?