论文部分内容阅读
同学们，我们在阅读英语文章的时候经常会碰到这样一些句子，如：
He has cleaned the classroom.
We have seen that film before.
Blue Beard had married many wives, but his wives had gone away.
这种have+动词ed的形式就是现在完成时。第3人称单数时，用has+动词ed；而had+动词ed的形式称为“过去完成时”。今天我们来初步接触一下吧。
1. 现在完成时着眼于现在，强调过去发生的某动作对现在造成的影响和结果。
I have cleaned the classroom. 我已经打扫过教室了。（强调扫地所产生的结果：地干净了！）
2. 现在完成时用来表示发生在过去某一时刻的，持续到现在的情况。常与for, since引出的一个时间段连用。
We have lived here for ten years. 我们在这儿住了十年了。（“住”是从过去持续到现在的动作）
We have lived here since we came here. 我们来这儿就开始住这里了。
3. 现在完成时往往与表示不确定的过去时间状语连用，如already，yet，just，before等。
He has already passed the exam. 他早就通过考试了。
We have seen that film before. 那部影片我们原先看过了。
Have they found the missing child yet？他们找到那个失踪的孩子了吗？
4.现在完成时常常与表示频度的时间状语连用，如twice，on several occasion等。
I have been to Beijing three times. 我去过北京三次。
George has met that gentleman on several occasions. 乔治碰到过那个先生几次。
有的同学会和一般过去时混同起来。它们可是大不相同哦！一般过去时表示过去某个时间发生的动作，常和表示过去的时间状语连用。如：last year，yesterday等，也可表示过去经常反复发生的动作，常和often，always等频率副词连用。
需要注意的是，现在完成时中的“动词ed的形式”是动词的过去分词，和动词的过去式形式可不要混淆哦！
记住以下常用不规则动词的过去式和过去分词：
Ｅxample:
A： Did you read this book last week?
B：Yes, I read this book last week.
A：What about Penny?
B：She hasn’t read this book yet.
1． Did you do your homework last Sunday? What about Tom?
2． Did your mother go to the butcher’s this morning?
3． Did you speak to him yesterday? What about Susan?
4． Did George swim across the river an hour ago? What about Sam？
5． Did you see that film yesterday? What about your uncle?
6． Did Kate water the garden a minute ago? What about Lily?
He has cleaned the classroom.
We have seen that film before.
Blue Beard had married many wives, but his wives had gone away.
这种have+动词ed的形式就是现在完成时。第3人称单数时，用has+动词ed；而had+动词ed的形式称为“过去完成时”。今天我们来初步接触一下吧。
1. 现在完成时着眼于现在，强调过去发生的某动作对现在造成的影响和结果。
I have cleaned the classroom. 我已经打扫过教室了。（强调扫地所产生的结果：地干净了！）
2. 现在完成时用来表示发生在过去某一时刻的，持续到现在的情况。常与for, since引出的一个时间段连用。
We have lived here for ten years. 我们在这儿住了十年了。（“住”是从过去持续到现在的动作）
We have lived here since we came here. 我们来这儿就开始住这里了。
3. 现在完成时往往与表示不确定的过去时间状语连用，如already，yet，just，before等。
He has already passed the exam. 他早就通过考试了。
We have seen that film before. 那部影片我们原先看过了。
Have they found the missing child yet？他们找到那个失踪的孩子了吗？
4.现在完成时常常与表示频度的时间状语连用，如twice，on several occasion等。
I have been to Beijing three times. 我去过北京三次。
George has met that gentleman on several occasions. 乔治碰到过那个先生几次。
有的同学会和一般过去时混同起来。它们可是大不相同哦！一般过去时表示过去某个时间发生的动作，常和表示过去的时间状语连用。如：last year，yesterday等，也可表示过去经常反复发生的动作，常和often，always等频率副词连用。
需要注意的是，现在完成时中的“动词ed的形式”是动词的过去分词，和动词的过去式形式可不要混淆哦！
记住以下常用不规则动词的过去式和过去分词：
Ｅxample:
A： Did you read this book last week?
B：Yes, I read this book last week.
A：What about Penny?
B：She hasn’t read this book yet.
1． Did you do your homework last Sunday? What about Tom?
2． Did your mother go to the butcher’s this morning?
3． Did you speak to him yesterday? What about Susan?
4． Did George swim across the river an hour ago? What about Sam？
5． Did you see that film yesterday? What about your uncle?
6． Did Kate water the garden a minute ago? What about Lily?