1. Some people think that …. To be frank, I can not agree with their opinion for the reasons below.

2. For years, … has been seen as …, but things are quite different now.

3. I believe the title statement is valid because….

4. I cannot entirely agree with the idea that …. I believe….

5. My argument for this view goes as follows.

6. Along with the development of…, more and more….

7. There is a long-running debate as to whether….

8. It is commonly/generally/widely/ believed /held/accepted/recognized that….

9. As far as I am concerned, I completely agree with the former/ the latter.

10. Before giving my opinion, I think it is essential to look at the argument of both sides.