there is still half an hour to go

题目

there is still half an hour to go
这里的to

答案

there is still half an hour to go 中to go 是指还剩多少时间【这是许国璋英语中的句子】
句子意思：还有半个小时
词典上的解释：
used for forming an infinitive that is the subject,object,or complement of a verb,or is the complement of an adjective,noun,or pronoun
即：此处to是用于形成不定式to go 是对前边的half an hour进行补充说明的
如：There are only five minutes to go 还剩下五分钟
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