中式英文：

I bought a refurbished laptop with a 3-month warranty.

（我買了一台有三個月保固期的整新品筆電。）

改錯研析：

1. I bought a refurbished laptop that came with a 3-month warranty.

2. I bought a refurbished laptop coming with a 3-month warranty.

3. I bought a refurbished laptop under a 3-month warranty.

(1) 產品「附帶保固」中的「附帶」是「片語動詞」come with，不能直接用「介係詞」with。

(2) 原句可採「關係子句」that came with a 3-month warranty 來修飾「名詞片語」a refurbished laptop（「關係代名詞」that 的「先行詞」），或用「現在分詞片語」coming with a 3-month warranty 來修飾也可以。

(3) 如果一定要用「介係詞」，應該是 under 而不是 with。