Вставьте as....as
1. Sergei is old Michael.
2. She is young Tom^s brother.
3. This woman is good that one.
4. Nick^s English is not good his friend^s.

1Sergei is as old as M.2she is as young as Tom's brother3this woman is as good as that one4Nick's English isn't as(so) good ad hisfriend's