英语语法,这个句子对吗?有语法错误吗?

问题描述:

英语语法,这个句子对吗?有语法错误吗?
Nowadays , an increasing number of people concerned about(or as to)the phenomena……However , whether you prop up it or not has caused heated debate.

不太对.首先,Nowadays就表示是现在,后面不能用过去时.另外,whether后面加or not有点多余了,you之后时态不明.可以用should.最后prop up it 改为prop it up.
建议改为:
Nowadays ,an increasing number of people concern about(or as to)the phenomena.However ,whether you should prop it up has caused heated debate.