完整版)一般过去时与现在完成时的用法区别
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完整版)一般过去时与现在完成时的用法区别
现在完成时常常和一些时间状语连用，如just。already。yet。ever。never。for。since等。这些时间状语可以更加明确地表达现在完成时的含义。
4.一般过去时与现在完成时的区别
一般过去时强调过去发生的动作，而现在完成时强调过去动作对现在的影响和结果。也就是说，一般过去时关注的是过去的事情，而现在完成时关注的是过去的事情对现在的影响。
例如：
I went to Paris last year.（我去年去了巴黎）
I have been to Paris twice.（我去过巴黎两次）
可以看出，一般过去时强调的是过去的动作，而现在完成时强调的是现在的经验和经历。
总之，现在完成时是一个重要的时态，它与一般过去时有着明显的区别。同学们在研究和使用时要注意区分，灵活运用，以便更好地表达自己的意思。
time buy→have
come→be here
XXX→be finished
leave→XXX
→be over
现在完成时是现在时态的一种形式，因此不能与过去的时间状语连用，如yesterday、last Sunday、in 1990、three years
ago等。然而，当强调动作产生的后果和影响时，可以与一些表示不确定时间的状语连用，如副词already和yet。already一般用于肯定句中，yet一般用于否定句和疑问句中。例如，我们已经完成作业了（We have already finished our
homework），他们还没有完成作业（XXX）。也可以使用ever和never，多用于否定或疑问句中，表示“曾经”或“从未”等。例如，你曾经去过长城吗（Have you ever been to the Great
Wall）？我从未去过长城（I have never been to the Great
Wall）。还可以使用表示到说话为止的过去时间状语，如just、before、up to now、the past few years等。例如，我以前见过她，但记不起在哪里见过（I have seen her before。but I can not
remember where），近几天他去过那里三次了（He has been there three times the last few days）。最后，可以使用包括“现在”在内的时间状语，如now、today、this morning (month。year。term)等。例如，今天你见过他吗？我没有（Have you
met him today。-No。I haven't），今年你去过那里多少次（How many times have you been there this year）？
现在完成时可以与带有since或for等表示“一段时间”的状语连用，表示动作或状态从某一时刻开始，一直持续到现在。例如，我已经两年没有见过他了（I haven't seen him for two
years）。但是，e、arrive、buy等终止性动词不能与表示“一段时间”的状语连用。如果要使用这些动词，必须改为使用延续性动词，如be（在）等来表述。例如，他已经到了（He has
arrived），我已经在这里等待了一段时间了（I have been here
for a while）。
His XXX.
The movie has been playing for ten minutes.
XXX.
It's been two years since his father died.
They've XXX twice.
XXX。XXX.
It has been two years since his father died.
It's been three years since we XXX.
Note: The present perfect tense is used to XXX in the present
or has just ended。It is formed with the auxiliary verb "have" (or
"has" for third person singular) + past participle.
since。for。ever。never。yet。just。already。recently。lately。so far。up to now。by now,等模糊的时间状语，或者不加时间状语。
终止性动词现在完成时的否定式可以表示一种持续的状态，并且可以和表示一段时间的状语连用。例如，自从1997年以来，我一直没有离开过这儿。
如果要表示行为或状态从过去一直持续到现在，我们可以使用现在完成时，并加上表示一段时间的时间状语，通常使用for+一段时间，或者since+时间点。例如，我从小就一直住在这里，或者我在这已经住了10年了。
当我们需要问现在完成时的时间状语时，通常使用how
long。例如，你在这里住了多久了？
需要注意的是，根据终止时间的不同，表示某一行为或状态持续多长时间的时态使用也不同。例如，去年夏天我在这里住了一周，使用的是一般过去时；到现在为止，我已经在这里住了一周，使用的是现在完成时；而明年我会在这里住一周，则使用的是将来时。
现在完成时和一般过去时的区别在于，现在完成时强调过去的事情对现在的影响，而一般过去时则只是单纯叙述过去的事情。此外，一般过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或者没有时间状语。
1.A.用already或yet
1) Have you finished your homework ________?
2) I have ________ XXX.
3) They haven't arrived ________.
2.改写以下句子：
1) XXX.
2) Why did you get up so early?
3) She has returned from Paris.
4) He has been in the League for three years.
5) XXX.
3.将以下句子改为过去时：
1) I have XXX.
2) XXX. 3) Tom has written a letter to his parents last night。
1.A.用already或yet
1) XXX?
2) I have already XXX.
3) XXX.
2.改写以下句子：
1) Yesterday。XXX.
2) Why did you wake up so early?
3) She returned from Paris.
4) He has been a member of the League for three years.
5) XXX.
3.将以下句子改为过去时：
1) I XXX.
2) He was already sent for. 3) XXX(不需要改写)
1.Have they removed the old pictures yet。No。they haven't.
2.Most of us have already XXX.
3.He said XXX.
B。用since或for
1.We have learned five lessons since the beginning of this
term.
2.Mrs Liao has been in the hospital since last week.
3.I have stayed at my aunt's for two weeks.
C。用have gone或have been
1.Where are the boy students。They have gone to the school
factory.
2.Is your father in。No。he has gone to Shenzhen。Has he
ever been there before。Yes。he has been there several times.
3.He asked me if I have been to Hangzhou before。I told him
that I wanted to go there for a visit as I have never been to that city
before.
2.选择填空
1.XXX I have tried it on。It fits me well.
2."He has learned to draw horses already." "When did he
learn?" "Last year."
1.XXX the students to begin。They were all nervous。but
they had studied hard and were ready。As they worked。some
students finished quickly while others took their time。When they
were all done。the teacher collected the papers and said they
would be graded and returned the following week.
Revised: XXX the students to start。Despite feeling us。XXX the test。the teacher collected the papers。XXX.
st night。I went to a concert with my friends。We had
been looking forward to it for weeks。The band played all their hit
songs。and the crowd was XXX along。At the end of the show。the lead XXX and said they hoped to see us again soon.
Revised: Yesterday evening。XXX anticipating it for weeks。The band performed all of their popular tunes。and the audience
