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1. I’d rather go to the Blue Lagoon Restaurant because I like to listen to quiet music while I’m eating. 我宁愿去蓝泻湖餐厅，因为我喜欢在吃饭的时候听轻柔的音乐。
while引导时间状语从句，从句中的谓语动词必须是延续性动词。如：be，stay，eat，wait，live等。
(1) 如果主句的动作和从句的动作同时发生，从句常用进行时。如：
While I was crossing the road, I saw him.
我在过马路的时候看见了他。
(2) 如果主句和从句主语相同，且从句谓语中又包含be动词， while引导的从句可用while+ving代替。如：
He was doing his homework while he was listening to music.
→He was doing his homework while listening to music. 他边听音乐边做作业。
[相关链接] while和when的区别
(1) while从句中的动词不能是瞬时性动词，而当when从句中的动词是延续性动词时，when可以用while来代替。如：
When / While the discussion was still going on, Mr Smith came in.
当讨论还在继续的时候，
(2) while可用于表示对比，意为“而”；when没有这个用法。如：
Jane was dressed in red, while Mary was dressed in blue.
简穿着红色的衣服，而玛丽却穿着蓝色的衣服。
2. For instance, they can help you to compare two different products so that you can buy the one you really need. 比如，他们有助于你比较两个不同的产品，以便你能买到真正需要的东西。
(1) for instance相当于for example。如：
What would you do, for instance / example, if you found one of your classmates stealing?
比如说，如果你发现你的一位同学正在偷东西，你会怎么办？
(2) so that在这里引导目的状语从句，表示“以便，为了”，这时从句的谓语动词常与情态动词can, may, will, could, might, would等连用。如：
I gave him a map so that he wouldn’t get lost.
我给了他一张地图为的是他不会迷路。
[相关链接] so that还可引导结果状语从句，意思是“以至于，所以”。如：
Bob often told a lie, so that no one believed him any more.
鲍伯常常撒谎，所以没人再相信他了。
湖南 郭雁斌
摘自英语周报新目标版
