请问when to leave is still a problem.中的when to可不可以作宾语,如果是,怎么变

问题描述:

请问when to leave is still a problem.中的when to可不可以作宾语,如果是,怎么变

when to leave 可以作宾语的.实际上是动词不定式前加了疑问副词.如要作表语:
The problem is when to leave.再问下when to leave这种疑问副词+动词不定式可以作名词吗应该说具有名词功效,可以作主语、宾语和表语。