同位语从句变成表语从句区别

That question whether we need it has not been considered.

That question is whether we need it has not been considered.

请问老师加了个be动词句子有什么区别呢？

网友的两个句子都不正确。不能用 that question。而且第二句是一个彻底的错句，一个从句同时具有两个作用：whether we need it 既是表语从句，有是主语从句。网友怎么能造出这样的句子来。

名词性从句 whether we need it，可分别作主语从句、宾语从句、表语从句、同位语从句。正确的例句是：

1. Whether we need it has not been considered. 主语从句

2. We haven't considered whether we need it. 宾语从句

3. The question is whether we need it. 表语从句

4. The question whether we need it has not been considered. 同位语从句

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

擅长：语法理论,语言学,文化背景 | 采纳率 86% | 回答于 1秒前

其它 0 个回答