Extent
how large, important, serious, etc. something is 程度，限度 [名词]
1. How can you expect us to make a reduction to that extent?
您怎么能要求我们减价那么多呢?
2. I was amazed at the extent of his knowledge.
我对他知识的渊博感到惊奇。
3. I disagree to some extent with this remark.
我在某种程度上并不同意这种说法。
4. To a certain extent, I am in favor of your project.
从某种程度上说，我赞成你的方案。
Extend
to make something longer or larger 延长，延伸;扩大，扩展 [及物动词]
1. There are plans to extend the no-smoking area.
现已有扩大无烟区的计划。
2. You can extend your knowledge by reading books.
你可以通过读书来增长知识。
3. We hope the boss can extend the deadline.
我们希望主管可以延长期限。
4. They want to extend their business scope.
他们想扩大业务范围。
to offer or give something to somebody 提供，给予 [及物动词] [正式用语]
1. The bank has promised to extend your company credit.
银行已经答应向你们公司提供信用贷款。
2. I extend my heartfelt thanks for your help.
我对你的帮助表示由衷的感谢。
3. Let us extend a very warm welcome to our new neighbours.
让我们向新邻居表示热烈的欢迎。
4. It was kind of you to extend an invitation to us.
感谢您对我们的邀请。
【注意】
1. 请注意extent和extend词性的区别，前者为名词，后者为动词。
2. extend最常见的意思是延长，扩大，当它表示提供，给予时，主要用于正式场合。
3. 关于extent一词，常见的搭配有：to some extent / to a certain extent / to a great extent