pokemon go重庆:英语的现在完成时和过去完成时是什么回事?还有宾语从句

现在完成时http://www.oldq.com.cn/rjbgz/yingyu/gaoyingyu/200605/35614.html

http://www.baidu.com/s?ie=gb2312&bs=emma&sr=&z=&cl=3&f=8&wd=%CF%D6%D4%DA%CD%EA%B3%C9%CA%B1&ct=0

过去完成时
http://www.hongen.com/eng/pub/yufac/1115.htm

http://www.study888.com/Article/school/cz/200604/160978.html

宾语从句

http://www.cqtbi.edu.cn/cqtbijwc/english%20learning.files/flash%20grammar/more%20grammar/grammar_5.htm

http://www.baidu.com/s?ie=gb2312&bs=%B9%FD%C8%A5%CD%EA%B3%C9%CA%B1&sr=&z=&cl=3&f=8&wd=%B1%F6%D3%EF%B4%D3%BE%E4&ct=0

宾语从句

宾语从句：是做动词、介词或形容词宾语的从句。

一、做动词的宾语：

I think (that) you will like the pictures.

我想你会喜欢这些画的。

（连接词that无意义，在从句中不充当任何成分，可以省略）

当宾语从句（通常是由that引导的宾语从句）有一宾语补足语时，常用it作形式宾语，而将宾语从句置于句末。例如：

I feel it important that they finish their own task in time.

（我觉得他们按时完成自己的任务是很重要的。）

二、做介词宾语：

They are worrying about whether they can get there in time.

You can write about whatever topic you can think of.

三、做形容词宾语：

Are you sure what you will do next?

I'm afraid that he will fail in the exam.

表语从句

表语从句：表语从句置于连系动词后面做表语。例如：

The question is whether the book is worth reading at all.（问题是这本书是否有点读的价值。）

That is why we don't like it.

It seems that all of the students have done their homework.

My idea is that we should all do our best.

This is where we found the strange trees.

It seems that everybody agrees to the decision.

同位从句

同位从句一般跟在某些名词如answer(答案)，hope(希望)，fact(事实)，belief (信仰)，news(消息)，idea(主意；观念)，promise(承诺)，information(信息)，conclusion(结论)，order(命令)， suggestion(建议)，problem(问题)，thought (想法)等后面。例如：

He always works hard even if he knows the fact that he is

not in good health.

His failure was due to the fact that he had not practised

for a long time.

I had no idea that you were here.

She told us her hope that she would become a pianist.

He made a promise that he would never come late.

注意：

that 既可引导同位语从句又可引导定语从句，其区别在于：同位语从句由连接词that引导，连接词that本身无意义，在同位语从句中不充当任何成分，不可省略，不可以用其他词替代；定语从句由关系代词that引导，关系代词that在从句中充当一定的成分，作宾语时可省略，由when, why, where引导的 同位语从句和定语从句的区别在于：

同位语从句由连接副词只起连接作用，没有指代作用； 定语从句由关系副词引导，关系副词具有指代先行词的作用，常用一个介词加关系代词替换。

例如:I will never forget the day when we first met.

（同位语从句, when为连接词）

That is the special day (which/that) I will never forget.

（定语从句，which/that为关系副词）

This is the house where we lived fifteen years ago.

（同位语从句, where为连接词）

This is the house which we sold fifteen years ago.

（定语从句，where为关系副词）
现在完成时have done 的时间标志是
in the past few/three years
since + 时间点/ sb dis
副词标志是
already,yet,never,ever
现在完成时可以单独使用

i have finished homework.
但过去完成时不可以单独使用

用在“It is the first/second...time+that”从句中

过去完成时 had done
时间标志
by last year/by the time of

过去完成时一般和过去时一起出现

sb had done sth before sb did
sb did sth after sb had done

用于hardly when, no sooner than的句式中
we had hardly came home when it rained.

用在“It was the first/second...time+that”句型中

现在完成时
have\has+过去分词
有两个用法 1.过去发生的事对现在有影响.
2.某一动作一直延续到现在.
常见时间:FOR+一段时间,SINCE+时间点,BEFORE,SINCE THEN等等.
过去完成时
had+过去分词
用法:这一动作发生在 过去的过去(一般来说,句中有两个动作,一个动作用过去时,另一动作发生在它之前就用过去完成时)
宾语从句
动词,介词后的成分叫宾语.若宾语是一句话就构成了宾语从句.

宾语从句

宾语从句：是做动词、介词或形容词宾语的从句。

一、做动词的宾语：

I think (that) you will like the pictures.

我想你会喜欢这些画的。

（连接词that无意义，在从句中不充当任何成分，可以省略）

当宾语从句（通常是由that引导的宾语从句）有一宾语补足语时，常用it作形式宾语，而将宾语从句置于句末。例如：

I feel it important that they finish their own task in time.

（我觉得他们按时完成自己的任务是很重要的。）

二、做介词宾语：

They are worrying about whether they can get there in time.

You can write about whatever topic you can think of.

三、做形容词宾语：

Are you sure what you will do next?

I'm afraid that he will fail in the exam.

表语从句

表语从句：表语从句置于连系动词后面做表语。例如：

The question is whether the book is worth reading at all.（问题是这本书是否有点读的价值。）

That is why we don't like it.

It seems that all of the students have done their homework.

My idea is that we should all do our best.

This is where we found the strange trees.

It seems that everybody agrees to the decision.

同位从句

同位从句一般跟在某些名词如answer(答案)，hope(希望)，fact(事实)，belief (信仰)，news(消息)，idea(主意；观念)，promise(承诺)，information(信息)，conclusion(结论)，order(命令)， suggestion(建议)，problem(问题)，thought (想法)等后面。例如：

He always works hard even if he knows the fact that he is

not in good health.

His failure was due to the fact that he had not practised

for a long time.

I had no idea that you were here.

She told us her hope that she would become a pianist.

He made a promise that he would never come late.

注意：

that 既可引导同位语从句又可引导定语从句，其区别在于：同位语从句由连接词that引导，连接词that本身无意义，在同位语从句中不充当任何成分，不可省略，不可以用其他词替代；定语从句由关系代词that引导，关系代词that在从句中充当一定的成分，作宾语时可省略，由when, why, where引导的 同位语从句和定语从句的区别在于：

同位语从句由连接副词只起连接作用，没有指代作用； 定语从句由关系副词引导，关系副词具有指代先行词的作用，常用一个介词加关系代词替换。

例如:I will never forget the day when we first met.

（同位语从句, when为连接词）

That is the special day (which/that) I will never forget.

（定语从句，which/that为关系副词）

This is the house where we lived fifteen years ago.

（同位语从句, where为连接词）

This is the house which we sold fifteen years ago.

（定语从句，where为关系副词）
现在完成时have done 的时间标志是
in the past few/three years
since + 时间点/ sb dis
副词标志是
already,yet,never,ever
现在完成时可以单独使用

i have finished homework.
但过去完成时不可以单独使用

用在“It is the first/second...time+that”从句中

过去完成时 had done
时间标志
by last year/by the time of

过去完成时一般和过去时一起出现

sb had done sth before sb did
sb did sth after sb had done

用于hardly when, no sooner than的句式中
we had hardly came home when it rained.

用在“It was the first/second...time+that”句型中
现在完成时
have\has+过去分词
有两个用法 1.过去发生的事对现在有影响.
2.某一动作一直延续到现在.
常见时间:FOR+一段时间,SINCE+时间点,BEFORE,SINCE THEN等等.
过去完成时
had+过去分词
用法:这一动作发生在 过去的过去(一般来说,句中有两个动作,一个动作用过去时,另一动作发生在它之前就用过去完成时)
宾语从句
动词,介词后的成分叫宾语.若宾语是一句话就构成了宾语从句.

别人讲的再多也不如找本语法书自己从头看,我的经验这样告诉你.