1. You're the best guitarist in the school.

⇒ No one in the school play guitar is better than you.

2. He didn't remember anything about it, and I didn't, either.

⇒ He forgot all about it, neither do I.

3. School uniforms don't have to be worn at all times.

⇒Students don't have to be wear school uniforms at all times.

4. Don't fry food which can be grilled.

⇒ Avoid frying food which can be grilled.

5. With luck, she will win the cookery competition.

⇒ If she is lucky, she will win the cookery competition.

 Chúc cậu học tốt!~ ༼ つ ◕◡◕ ༽つ❤︎

Btw cho tớ xin đánh giá 5* + 1 cảm ơn + 1 câu trả lời hay nhất ạ.