现在完成时的学习

现在完成时的学习

一．基本结构：助动词have/has+过去分词(done)

二．句型：

否定句：主语+have/has+not+过去分词+其他.

一般疑问句：Have/Has+主语+过去分词+其他.

简略答语: Yes,主语+ have/has.(肯定)

No,主语+ haven't/hasn't.(否定)

三．用法

（1）现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果

I have spent all of my money (so far).(含义是:现在我没有钱花了.)

Guo zijun has (just/already) come. (含义：郭子君现在在这儿)

My father has gone to work.(含义是:我爸爸现在不在这儿)（2）现在完成时可以用来表示发生在过去某一时刻的,持续到现在的动作（用行为动词表示）或状态（be动词表示）常与for（+时间段）,since（+时间点或过去时的句子）连用.

①for+时段

②since+过去一个时间点（译为：自从……以来）

③since+时段+ago

④since+从句（过去时）

●⑤It is+时段+since+从句（过去时）

Mary has been ill for three days.

I have lived here since 1998.

四．has gone (to),has been (to), has been (in)的区别

Have/Has gone(to) :去了(现在不在说话现场)

Where is your father？He has gone to Shanghai.

Have/Has been (to) :去过（已不在去过的地方）

My father has been to Shanghai.

Have/has been in：呆了多久（还在所呆的地方）

My father has been in Shanghai for two months. /since two months ago.

五．现在完成时的标志

1. 现在完成时的含义之一是过去完成的动作对现在仍有影响,用以下四大标志词可以表达这种含义:

* 以already, just和yet为标志

He has already got her help. 他已得到她的帮助。

He has just seen the film. 他刚刚看过这场电影。

He hasn't come back yet. 他还没有回来。

* 以ever和never为标志

This is the best film I have ever seen. 这是我曾经看过的最好的一部电影。

He has never been to Beijing. 他从没有到过北京。

* 以动作发生的次数为标志

He says he has been to the USA three times. 他说他已经去过美国三次了。

* 以so far（到目前为止）为标+before

He has got to Beijing so far. 到目前为止他已到了北京。

She has passed the exam so far. 到目前为止她已经通过了考试。

2.过去已经开始的动作一直延续到现在, 甚至有可能继续延续下去,我们可以从动作“延续”的特性和“时间”点段的区分入手,进一步学习现在完成时。

* ①for+时段②since+过去一个时间点（过去从句）为标志

注意：1)现在完成时不能单独与过去的时间状语连用,如yesterday, last week, three years ago等; 2)不能与when连用 2.现在完成时往往同表示不确定的过去时间状语连用

六．过去分词

1 、规则动词：规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。四点变化规则：

(1)、一般动词，在词尾直接加“ ed ”。

work---worked---worked ,visit---visited---visited

(2)、以“ e ”结尾的动词，只在词尾加“ d ”。

live---lived---lived ,

(3)、以“辅音字母+ y ”结尾的动词，将 "y" 变为 "i" ，再加“ ed ”。

study---studied---studied ,cry---cried---cried

(4)、重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。

stop---stopped---stopped , drop---dropped--dropped

2 、不规则动词：

AAA型

原型过去式过去分词

burst burst burst

hurt hurt hurt

let let let

cast cast cast

cost cost cost

cut cut cut

hit hit hit

put put put

set set set

shut shut shut

spread spread spread

read read read read原形发音为/ri:d/,过去式和过去分词发音为/red/

AAB型

beat beat beaten

ABA型

become became become

run ran run

come came come

特殊情况

ABB型

bring brought brought

buy bought bought

build built built

burn burnt burnt

catch caught caught

dig dug dug

feel felt felt

fight fought fought

find found found

hear heard heard

hold held held

keep kept kept

lay laid laid

lead led led

lose lost lost

make made made