考研英语的英文表达主要有以下两种常见形式：

核心表达

- Postgraduate Entrance Examination

- Take the Postgraduate Entrance Examination

- Enter the Postgraduate Entrance Examination

扩展表达

- Take part in the national postgraduate entrance examination

- Participate in the postgraduate admission process

补充说明

考研英语的官方名称也可写作 National Postgraduate Entrance Examination，但日常交流中更推荐使用前两种表达。- 若强调"参加考试"的动作，可用 take part in；若强调"进入研究生阶段"，可用 enter。建议根据具体语境选择表达，例如：

"I am preparing for the Postgraduate Entrance Examination"

"She took part in the national postgraduate entrance examination last year"