UC知道This is all that our headmaster said at the meeting
来源：百度知道 编辑：UC知道 时间：2024/06/22 20:14:04
为什么是is不是was？是that不是what
第一个问题： is 是一般现在时，说明陈述者说的东西是现在还存在的。主要要看上下文，如果上下文都是一般现在时，这里当然也用一般现在时。而校长说的话是已经发生的事，所以要用said。
第二个问题：如果没有all，可以用what，有了all，只能that。
"this is all"是现在酎时与后丈老师说话时的时间没有关系,面后面"headmaster said"是修饰前面all的,是定语从句,所以用that
This is ...单数 (pron) These are...
that ... (conj)引导名词子句
是that is all 还是 this is all
1. This is true of all cases.
This passport is validfor all countries unless otherwise endorsed.
this kind of thing is taking all my sanity
it is not surprising tha解释
This is the mount of which the top is covered with snow all the year round.
In this poor country, survival is still the leading industry; all else is luxury
判断正误：It is I that is to blame for all this.
2.Is there any need___ all this hurry?用介词填空
You know all this is real as long as you are confident, passionate, and committed.