作业帮英语语法。。。。。。
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/08/29 18:24:49
before that since when 在it +be 动词+。。。。的句子中的区分是什么呀 O(∩_∩)O谢谢
解题思路： 理解句子结构和搭配
解题过程：
你好，答疑如下
注意时态变化和搭配内容。
1 before：
It was +时间段+before +从句用过去时。翻译：过了多久 才
如：It was 2 weeks before I finished work. 过了2周 我才完成作业。
It will be +时间段+before +从句用一般现在时。翻译：要过多久 才
如：It will be 2 days before I finish work. 要过两天我才完成作业。
2，when
It be +时间点+ when +从句
如：It was 3 o'clock when I got home.当我到家时，三点了。
3，that
It is/ was + 被强调的成分，即主，宾，状，表语或原因，时间状语从句等+ that +句子剩余部分。判定标准，若去掉It is that 句子结构完整，语义正确就是强调句。
如：It is at school that I play football. 是在学校我踢得足球。
4，since
It is / has been +时间段+ since+从句用过去时。自从做某事以来多久了。
如：It is 3 years since I saw him.
原你满意，异议来信。
最终答案：略
解题过程：
你好，答疑如下
注意时态变化和搭配内容。
1 before：
It was +时间段+before +从句用过去时。翻译：过了多久 才
如：It was 2 weeks before I finished work. 过了2周 我才完成作业。
It will be +时间段+before +从句用一般现在时。翻译：要过多久 才
如：It will be 2 days before I finish work. 要过两天我才完成作业。
2，when
It be +时间点+ when +从句
如：It was 3 o'clock when I got home.当我到家时，三点了。
3，that
It is/ was + 被强调的成分，即主，宾，状，表语或原因，时间状语从句等+ that +句子剩余部分。判定标准，若去掉It is that 句子结构完整，语义正确就是强调句。
如：It is at school that I play football. 是在学校我踢得足球。
4，since
It is / has been +时间段+ since+从句用过去时。自从做某事以来多久了。
如：It is 3 years since I saw him.
原你满意，异议来信。
最终答案：略