请帮助解决这句话的语法问题：I'd like to make sure of the time it leaves.I'd like to make sure of the time it leaves.我不理解“it leaves”中为什么要加“s”?请具体解释这句话的语法,
问题描述：
请帮助解决这句话的语法问题：I'd like to make sure of the time it leaves.
I'd like to make sure of the time it leaves.
我不理解“it leaves”中为什么要加“s”?
请具体解释这句话的语法,
答
time是不可数名词，所以动词用现在时的单数形式
答
第一是 time是不可数名词，动词要用第三人称单数的形式，
二是，leave前是it it也是一个第三人称单数，后面的动词也是要加s的（一般的情况是第三人称单数动词后加s，还有加es的）
答
i'd like to make sure of the time (that) it leaves
it leaves 是time的定语从句
leaves是单数第三人称,配合定语从句中主语的it.