帮忙分析语法:What time do you start boarding?你何时登机?

问题描述:

帮忙分析语法:What time do you start boarding?你何时登机?
boarding是动名词吗?在句子中充当什么成份?
祝你愉快!

start是动词,用法是:start doing,也就是后面跟动名词作宾语