Because the tree was mentioned in a newspaper, the number of visitors to Frinley has now increased.

问题描述:

Because the tree was mentioned in a newspaper, the number of visitors to Frinley has now increased.
其中has now increased中间有now为什么还要用完成时

这个是现在完成时,游客的人数目前还在继续增加,没有停止.如果这里是had increased(过去完成时),就不能用now了.两种完成时不一样.