“书面英语”常见的英文表达是 written English。
例如：
His written English is excellent, but his spoken English needs improvement.（他的书面英语很棒，但口语还需要提高。 ）
We should pay more attention to grammar and vocabulary when learning written English.（学习书面英语时，我们应该更加关注语法和词汇。 ）