Analyze this sentence and provide a grammatically correct rephrase.
My brother is not clever enough as my sister.
My brother is not as clever as my sister.
Complete the following task based on the instruction and optional input provided.### Instruction:
Analyze this sentence and provide a grammatically correct rephrase.

### Input:
My brother is not clever enough as my sister.

### Output:
My brother is not as clever as my sister.