The usage license for articles on article base and other article syndication directories generally require the article to not be altered and that the author’s source is included with a link to the author’s web page. So you need to comply with the terms to avoid copyright violations.
Here are the terms from the articlebase.com website:
Publisher Terms of Service
All articles that are republished from ArticlesBase.com must contain a live DOFOLLOW link back to the original article on ArticlesBase.com
You must respect the copyright of each author whose articles you wish to publish. This includes but is not limited to 1. Resource Box, 2. Any links provided by the author – all these links must remain intact and not altered in any way.
You must not change, edit, or reword any part of any article not written by you.
You must agree to keep hyperlinks “live” and FOLLOW links so that users can click on said link and be taken to its destination.
You agree to never use any articles obtained from ArticlesBase.com in any form of spam or unsolicited mail.
You agree to not publish any articles on sites that contain hate, racist, warez, porn, or any other illegal material.
You agree to never sell any article obtained from our directory without written consent from the author. This includes selling articles individually or in a compilation.