求语法分析

Question

Problems with childcare remain the biggest barrier to women succeeding at work

remain 不及物动词，在这里是怎么用的？

Answer 1

作为系动词，类似BE动词之类的

Answer 2

这里，不算是语法问题吧，请详细看第一点的第1小点，REMAIN接名词作表语
remain的用法归纳如下：
一、 用作联系动词，指某人或某事物仍保持某种状态，意为“仍然；依旧”，“留；呆；住；待”，后面可接名词、代词、形容词、介词短语、分词作表语。
1. 接名词作表语 :Peter became a manager, but Jack remained a worker.
It remained a secret.
2. 接形容词作表语 :Whatever achievements you’ve made, you should remain modest.
3. 接介词短语作表语 :He had to remain in hospital until he was better. 他
4. 接过去分词作表语,表示主语所处的状态或已经发生的被动动作；现在分词作表语，表示正在进行的主动动作。
The guests came in, but she remained sitting at the desk reading.
As before, he remained unmoved.
二、用作不及物动词，意思是“剩下；剩余；遗留”，此时不能用进行时态，也没有被动语态。
After the fire, very little remained of his house.
After the earthquake, very little remained of the city of Tangshan.
三、指某事“尚待、有待于以后被处置”，后面常接不定式的被动形式，表示主语是不定式的承受者。
Many problems remain to be solved.
It remains to be seen whether you are right.
四、remain作名词
remain作名词时表示“剩余物”,一般用其复数形式。例如：
The archeologists found some remains of the Song Dynasty.
五、remaining的用法
remaining是形容词,意为“剩余的”,常作前置定语；而left则只能作后置定语。例如：
There are still some apples left.
I bought a gift for her with the remaining money.