同学你好，该知识点来自沪江网校《BEC商务英语初中高级 四项全能实战签约【现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好
这里的that是宾语从句中的that，起引导作用，that从句后面表示说话的具体内容。And before you say that the centres are looking outdated and that consumer tastes and fashions have changed 在你说中心已经过时，消费者的品味和时尚已经改变之前
宾语从句补充：
宾语从句的从属连词主要有that,if,whether.that引导表示陈述句的宾语从句,而if和whether引导表示“是否”的宾语从句.
He told me that he would go to the college the next year他告诉我他将在下一年上大学.
I don’t know if there will be a bus any more.我不知道是否还会有公交车.
Nobody knew whether he could pass the exam.没人知道他是否会通过考试.

祝学习愉快！
连接代词主要有who, whom ,whose ,what ,whoever ,whomever ,whoseever, whatever, whichever等.连接代词一般指疑问,但what, whatever除了指疑问外,也可以指陈述.
Do you know who has won this game?你知道谁赢了这一局游戏吗 I don’t know whom you should depend on.我不知道你该依靠谁.
The book will show you what the best CEOs know.这本书会告诉你最好的执行总裁该了解些什么.
Have you determined whichever you should buy,a Huawei or Apple smart phone?你决定好是买华为还是苹果的手机了吗?
连接副词连接副词主要有when,where,why,how,whenever,wherever,however等.
He didn’t tell me when we should meet again.他没有告诉我什么时候我们能再见面.
Could you please tell me how you read the new panel?你能展示给我怎么用这个新的操作盘吗?
None of us knows where these new parts can be bought.没有人知道这些的新的零件能在哪里买到.