Sometimes-always

Hello,
I have to rewrite the following sentences into the negative form without changing the meaning.

1. He is sometimes foolish. ( given as ---affirmative)
A. He is not always foolish. (negative)
B. He is not always wise. (negative)

2. He always play cricket. (given as ---affirmative)

2A. He never fails to play cricket. (negative)

Are #A,#B and #C correct?

Thanks.