请问下面这两个句子中的不定式做什么成分？麻烦您了，谢谢！

Question

①There's still plenty of time for them 【to score】.
②The box was a magic box,and was difficult 【to open】.
我还想问问您，England itself is part of an island.和No one helped them,so they did it themselves.中的“England”和“itself”是不是同位语？；“they”和“themselves”是不是同位语？
麻烦您了，谢谢！！

Answer 1

①There's still plenty of time for them 【to score】.
与介词for连用，构成不定式短语/
不定式复合结构，整体做表语。
②The box was a magic box,and was difficult 【to open】.
不定式做后置定语

England itself is part of an island.
主语的同位语
No one helped them,so they did it themselves
主语they的同位语,换个位置看得更清晰（they themselves did it）追问

谢谢您！

能翻译一下②句子吗？
麻烦您了，谢谢！

追答

这是一个魔盒，而且要打开很困难。
或
这是一个魔盒，而且很难打开。

来自：求助得到的回答