Question

英语时态

do you have lunch?
did you have lunch?
have you had lunch?
do the three sentences have the same meaning?
你刚刚吃过了吗？你已经吃过了吗？这两句有什么区别？
如果要问别人吃过饭没，应该用哪个句型？
回复：浪子
我对您的过去时态的说明不是很理解。既然可以说I had lunch yesterday，为什么不能说did you have lunch（你吃过饭了吗） 呢？

Answer 1

表示的意思当然是不一样的.三个句子的时态分别是:一般现在时,一般过去时,现在完成时.
第一句话:你吃午饭吗?表示的意思是你每天的午饭你都吃不吃,不管是过去还是现在,表示一种习惯,比如我,每天的早饭我都不吃,所以这是一种习惯,译为I don't have breakfast everyday.
第二句话:你吃午饭吗?表示提问者想了解他相对于现在的过去吃不吃午饭.他现在可能每天吃午饭,但是过去他可能每天不吃.和第一句的意思一样,只是时态不同,一个是想知道他现在每天吃不吃午饭,一个是想知道他过去每天吃不吃午饭.
第三句话:你吃过午饭了吗?意思是问他午饭吃了没有,紧表示的是当天的一次午饭,如果没吃的话,我请你吃.^_^

以上是我对这三句话的理解,你可以参考.

Answer 2

英语中根据时间和形式一共有16种时态:
1.
一般现在时:结构:由动词表示;但是，如果主语是第三人称单数，将谓语动词改为第三人称单数形式.
2.
一般过去时:结构:由动词的过去式表示，动词的过去式有规则变法和不规则变法两种(规则变法就是在动词后面加ed的那种;不规则变法，在教科书单词的后面有一页是表示动词不规则变法的).
3.
现在进行时:结构:由助动词(am/
is/
are)+动词的现在分词表示.动词的现在分词，就是在动词后面按要求+ing.
4.
现在完成时:结构:有助动词(have/has)+动词的过去分词.动词的过去分词的变法跟动词过去式的变法相同.
5.
现在完成进行时:结构:有助动词(have/has)+助动词been+动词的现在分词表示.
1.一般现在时:
eg.
He
goes
to
school
by
bike
every
day.
否定句:He
doesn't
go
to
school
by
bike
every
day.
一般疑问句:Does
he
go
to
school
by
bike
every
day?
特殊疑问句:
(He):Who
goes
to
school
by
bike
every
day?
(goes
to
school):What
does
he
do
by
bike
every
day?
(by
bike):How
does
he
go
to
school
every
day?
(every
day):When
does
he
go
to
school
by
bike?
2.
一般过去时:
eg.
He
wrote
a
letter
last
night.
He
didn't
write
a
ltter
last
night.
Did
he
write
a
ltter
last
night?
(He):Who
wrote
a
ltter
last
night?
(wrote
a
letter):
What
did
he
do
last
night?
(last
night):
When
did
he
write
a
letter?
3.
现在进行时:
eg.
They
are
playing
football
there.
They
aren't
playing
football
there.
Are
they
playing
football
there?
(They):
Who
is
playing
football
there?
(playing
football):
What
are
they
doing
there?
(there):Where
are
they
playing
football?
4.
现在完成时:
eg.
Tom
has
worked
in
that
company
for
5
years(=since
5
years
ago).
Tom
hasn't
worked
in
that
company
for
5
years.
Has
Tom
worked
in
that
company
for
5
years?
(Tom):Who
has
worked
in
that
company
for
5
year?
(in
that
company):Where
has
Tom
worked
for
5
years?
(for
5
years):How
long
has
Tom
worked
in
that
company?
5.
现在完成进行时:
eg.
He
has
been
reading
in
his
room
the
whole
day.
He
hasn't
been
reading
in
his
room
the
whole
day.
Has
he
been
reading
in
his
room
the
whole
day?
(He):Who
has
been
reading
in
the
room
the
whole
day?
(reading):What
has
he
been
doing
in
his
room
the
whole
day?
(in
his
room):Where
has
he
been
reading
the
whole
day?
(the
whole
day):How
long
has
he
been
reading
in
his
room?
不知道是否帮到你.

Answer 3

当然不一样
你吃中饭吗
你刚刚吃过了吗
你已经吃过了吗
一般现在时。过去时，现在完成时当然不一样

Answer 4

一般现在时
一般过去时
现在完成时
一般现在时

Answer 5

时态不一样
1 一般现在时 吃饭没有？
2 一般过去时 吃了饭没有？
3 现在完成时 吃完饭没有？