一、considerable的意思是相當大（或多）的；重要的，值得考慮的。具體用法，請看下面的例句：

1、He brought to the job not just considerable experience but passionate enthusiasm.

他不僅給這一工作帶來了不少經驗，而且傾注了極大的熱情。

2、Shares and bonds can bring one quite a considerable additional income.

股票和債券能給人帶來不菲的額外收入。

3、To be without Pearce would be a considerable blow.

要是缺了皮爾斯，那會是相當大的打擊。

4、He owns considerable real estate.

他擁有相當可觀的房地產。

二、considerate的意思是考慮周到的,體貼的,體諒的,深思熟慮的,為他人著想。意思上跟considerable一點也不一樣。

1、I've always understood one should try and be considerate of other people.

我一直認為一個人應該盡量為他人著想。

2、I think he's the most charming, most considerate man I've ever known.【CET4 、TEM4】

我覺得他是我所認識的最有魅力、最體貼的男士。

3、As a way to practice, make it a goal to do 5 little things each day that are kind and considerate.

作為練習的途徑，把每天做5件小事作為一個目標，那就是很善良和考慮周到了。

4、The patient has the right to considerate and respectful care.

病人有權得到周到而禮貌的照顧。

5、We have all wished for men who are more considerate.

我們都曾祈求能找到更加體貼的男人。

（來源：網絡）