英语语法有两个句子语法请各位帮我看看andthatthereareseveralorganisationsintheuniversityandcitywhosemainpurposeistoofferhelpandensurethatyourtimewithusisenjoyableanduseful.这里的whose是什么用法?is

Question

英语语法
有两个句子语法请各位帮我看看

and that there are several organisations in the university and city whose main purpose is to offer help and ensure that your time with us is enjoyable and useful.这里的whose是什么用法?is是修饰organisations之前一段的吗?

so anything you can do to improve ypur spoken English-even beyond the pretty high levels most of you have already reached-will help make your stay with us that bit more fun for you.这句话又是什么结构啊,有点乱.

Answer 1

whose 引导的是定语从句,whose main purpose is to offer help and ensure that your time with us is enjoyable and useful这一整句都是修饰的organisations.至于is,这段里有两个,第一个is的主语是purpose,意为“目的是”,第二个is的主语是time,意为“时间（你和我们在一起的时间）是”
第二段可以看我做的括号标记,so anything you can do to improve ypur spoken English （even beyond the pretty high levels most of you have already reached）will help make your stay with us that bit more fun for you 理解意思的时候可以忽略括号里的,直接翻译为：你能做的所有能提高你口语的努力都会使你跟我们在一起的这段时间变得更有趣.括号里的是修饰spoken English,算是一个插入语,意思是提高你的口语,提高到什么程度呢?提高到你们大多数人已经达到的一个很高的程度.所以整段翻译可以为：你能做的所有能够提高你的口语到某个程度,甚至是超过你们大多数人已经达到的一个高度的努力都会使你跟我们在一起的这段时间变得更有趣.
不知道我这么说你能不能明白.