1.Contrary to widely accepted views, I believe that...
2.What people fail to consider is that...
3.It is one thing to insist that..., it is quite another to show that...
4.Just as..., so...
5.…has drawbacks as well as merits.
6. A is superior(inferior) to B.
7.A is just the opposite (to B)
8.Among the most convincing reasons given by people for..., one should be mentioned...
9.One may think of the trend as a result of...