which
which 引导的定语从句时态？
引导的定语从句时态？
which引导的定语从句，原则上是和主句时态一样，但是是客观事实，一般规律都用一般现在时态，这是英语的普遍规律，定语从句这个简单，需要记住的是宾语从句的时态规律，主将从现，主句是过去式，从句一定也是过去的任何时态，还有状语从句也是一样的，有这样的规律。
定语从句的谓语动词要看什么？
1、定语从句中的谓语动词取决于先行词的单复数，如果先行词是单数，从句中的谓语动词要用单数，如果先行词是复数，谓语动词就要用复数。
2、定语从句，一个简单句跟在一名词或代词后进行修饰限定，就叫做定语从句。通俗来讲，从句在整个句子中做定语，这个从句就叫做定语从句。在主句中充当定语成分。被修饰的词叫先行词。定语从句不同于单词作定语的情况，通常只能放在被修饰的词之后
英语中，定语从句是一个非常重要的结构。当定句从句的引导词 who, that 或者 which 在定语从句中充当主语的时候，其谓语动词的选择是各类考试中的常考点。今天我们一起来学习一下。
语法规则：无论是who, that 还是which 在定语从句中充当主语，其谓语动词的选择以先行词为准，先行词为单数，则谓语用单数；先行词为复数，则谓语用复数。我们通过几个例句进行体会。
例句1：
This is one of the most interesting booksthat are sold here.
这是这里卖的最有趣的图书之一。
例句2：The piecewhich was played on the erhu especially moved me.二胡演奏的那个曲子特别让我感动。
例句3：The boywho is playing basketball is my brother.打篮球的男孩是我的哥哥。
例句4：No one wants to read booksthat are boring.没人有愿意读无聊的书。
例句5：I like to watch moviesthat are scary.我喜欢看恐怖电影。
英语必修三四单元reading的定语从句？
CAUGHT BY A BLACK HOLE
spaceship warned Li Yanping and me to be ready as we were approaching (靠近) the black hole. as--时间状语
2.We could see some faint lights around what looked like an empty space. what--宾语
Li Yanping said, That empty hole is like a mouth always needing to be fed. said 后，“ ”里宾语
lights are things that are being pulled into it by the gravity of the hole. that -定语
5.We watched with interest and amazement at the lights which seemed to be going fainter and fainter round the edge of the black hole. which -定语
As the spaceship moved round the black hole, I felt rather sick. as -时间状语
All the stories about what happened when you were caught by the gravity of a black hole seemed to be true. what -宾语；when --时间状语
8.We realized that we had discovered something new about black holes. that -宾语
If you go inside the edge of a black hole, it will eat you and there is no escape; but if you do not, you may have an opportunity to escape. How exciting! if - 条件状语