Asked by rfvv
                1. She can run as fast as him.
2. She can run as fast as he.
3. She can run as fast as he can.
4. She can run as fast as he can run.
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Are they all grammatical? Can we use all of them?
            
        2. She can run as fast as he.
3. She can run as fast as he can.
4. She can run as fast as he can run.
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Are they all grammatical? Can we use all of them?
Answers
                    Answered by
            Writeacher
            
    1 is incorrect.
2 and 3 are the most often used.
4 is correct, but wordy and not used much.
    
2 and 3 are the most often used.
4 is correct, but wordy and not used much.
                    Answered by
            rfvv
            
    5. She can run as fast as he can run fast. 
6. She can run fast. He can run fast.
=> She can run as fast as he can run fast.
[Thank you for your help. What about these ones?]
    
6. She can run fast. He can run fast.
=> She can run as fast as he can run fast.
[Thank you for your help. What about these ones?]
                    Answered by
            Writeacher
            
    Those are too wordy/repetitive. Here's the best way to say this:
She can run as fast as he can.
    
She can run as fast as he can.
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