happened,was happened,have been happened和have taken place的区别

happened,was happened,have been happened和have taken place的区别只有happened、have happened和have taken place的表达形式。因为happen是【不及物动词】,没有表达形式was happened和have been happened。happened是【过去偶然发生】。have happened是【已经偶然发生】。have taken place是“发生、举行、举办”,一般指【非偶然性事件的“发生”】。即：这种事件的发生一定有某种原因或事先的安排。例如：Great changes have taken place in our hometown during the past ten years。