a.John didn't accept it,because of Mary.b.John didn't accept it because of Mary.有什么区别

问题描述:

a.John didn't accept it,because of Mary.b.John didn't accept it because of Mary.有什么区别

没有区别,只是a句停顿了一下,类似于补充内容.
b句说的很连贯,because of Mary 好像就是说话者 要着重表达的
希望对你有用!