请帮助解决这句话的语法问题：I'd like to make sure of the time it leaves.
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.
我想要确认班机时间没有改变.
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
加“s”是因为it是单数第三人称形式,并且在一般现在时的情况之中
这句话总的来说是一个复合句,主句是：I'd like to make sure of the time,我想确定下时间
后面的it leaves是time的从句,省略了连接词which/that
原句应是：I'd like to make sure of the time which/that it leaves.
it 可能指的是具体的事物,如飞机等
整句话的意思是：我想确定下它（如飞机,火车等）离开的时间