一、considerable的意思是相当大（或多）的；重要的，值得考虑的。具体用法，请看下面的例句：
1、He brought to the job not just considerable experience but passionate enthusiasm.
他不仅给这一工作带来了不少经验，而且倾注了极大的热情。
2、Shares and bonds can bring one quite a considerable additional income.
股票和债券能给人带来不菲的额外收入。
3、To be without Pearce would be a considerable blow.
要是缺了皮尔斯，那会是相当大的打击。
4、He owns considerable real estate.
他拥有相当可观的房地产。
二、considerate的意思是考虑周到的,体贴的,体谅的,深思熟虑的,为他人着想。意思上跟considerable一点也不一样。
1、I've always understood one should try and be considerate of other people.
我一直认为一个人应该尽量为他人着想。
2、I think he's the most charming, most considerate man I've ever known.【CET4 、TEM4】
我觉得他是我所认识的最有魅力、最体贴的男士。
3、As a way to practice, make it a goal to do 5 little things each day that are kind and considerate.
作为练习的途径，把每天做5件小事作为一个目标，那就是很善良和考虑周到了。
4、The patient has the right to considerate and respectful care.
病人有权得到周到而礼貌的照顾。
5、We have all wished for men who are more considerate.
我们都曾祈求能找到更加体贴的男人。