Question

He is not such a clever boy that you are.... Error????

Answer 1

The given sentence can be written correctly as shown and explained below:

He is not such a clever boy as you are.

Explanation:

‘Such as’ is an idiom that means ‘for example’; whenever we use such as to mean for example, we must use the two words as one unit, together.  

Example:  

Sincere students such as Raman are becoming rare.