现在完成时态语法.ppt

THE PRESENT PERFECT TENSE
the Present Perfect Tense
现在完成时
助动词have (has)+过去分词 have (has)+ done
I finished my homework an hour ago.
He went to the club yesterday.
Mother made a cake last Friday.
I have just finished my homework.
He has already been to the club.
Mother hasn’t made a cake yet.
过去分词规则变化遵循以下原则:(1) 一般情况下,在动词后加-ed 构成:work→ worked                 play→ played(2) 在以不发音字母-e结尾的动词后只加-d:close→ closed                    agree→ agreed (3) 以辅音字母加 y 结尾的动词,应将 y 改为i 再加-ed:study→ studied                   carry→ carried(4) 以重读闭音节结尾且末尾只有一个辅音字母的动词,要双写末尾的辅音字母再加-ed:stop→ stopped              drop→dropped
already – just – so far - yet
(since and for ) + a period of time
Examples:
●I have just cleaned the house.
●He has already been to Japan.
●They have built two new houses so far.
●He has studied English since 2004.
●You haven’t written the letter yet.
already 已经(多用于肯定句)
yet 已经(多用于疑问句、否定句);

never 从不 ever 曾经 recently 最近
just 刚刚、仅仅 before 以前
in the past 4 years 在过去的4年
so far /up to now 到目前为止
for 3 years 已经三年
since 2000 自从2000
since she came to the school
现在完成时态标志词
重点1
1. He has _____read this book. (从未)
2. We have known each other_______ (以前)
Brown has taught English____ 20 years.
4. I have lived in Beijing ____1990. (长达,自从……以来)
5. My brother _______in the army for 3 years. (be)
6. She_______ (工作)in the bank_____ she finished high school.(自从……以来)
never
before
for
since
has been
has worked
since
Tom four years ago.
现在完成时与一般过去时
Tom in Beijing for four years.
Tom in Beijing since he was born.
now
now
now
was born
has lived
has lived
since and for
The woman has worked at the school for 2 years.
The woman has worked at the school since two years ago.
The woman has lived there since 1999.
We have known each other since she came to the school
重点 2
for+一段时间: for 2 years /2 days/3hours
since +时间点: since2000/last night / 2 o’clock
since+一段时间+ago: since 2 years ago
since+一般过去时态的句子:
since she came to the schoo