by+时间 出现用什么时态
1、“by＋时间”与动作性强的动词连用时，主句多用于完成式。by后的时间可指现在、过去或将来时间点。
如：by
the
time
he
was
fourteen
year
sold，he
had
learned
maths
all
by
himself.
i
shall
have
finished
it
by
the
time
you
come
back.
by
the
end
of
the
match,
they
had
kicked
two
goals
and
we
had
kicked
four.
they
must
have
finished
their
work
by
this
time.
但是，上述情况中当时间为将来时，主句动作发生在从句动作之后时，主句动词可用一般时态。如：if
you're
not
better
by
then,
i'll
take
you
to
see
the
doctor.如果到那时还不好些，我就带你去看病。
can
you
finish
this
by
tomorrow?
在明天以前你能做完这件事吗？
间或有用进行式的。如：by
the
end
of
the
first
week
the
head
of
the
department
was
saying
very
nice
things
about
me.
第一周末时系主任给我多多美言了几句。
2、“by+时间”与表状态的动词连用多用于一般式。by后时间可为现在、过去或将来时。如：by
the
end
of
the
century
the
population
numbered
about
four
million.
到世纪末人口已经达到四百万左右。you
can
borrow
my
camera,
but
i
must
have
it
back
by
five
o'clock.我的照像机你可以借去用，但是五点以前一定要还我。
by
the
time
that
the
security
guards
had
realized
what
was
happening,
the
gang
were
already
inside
the
bank.
等到保卫人员明白过来发生了什么事时，那一伙强盗已经进了银行。
he
ought
to
be
here
by
this
time
/by
now.他此刻（现在）应该已经来到这里了。
如强调某状态在某时间前已经完成，也常用完成式。如：by
next
sunday
you
will
have
stayed
with
us
for
three
months.至下星期日为止，你将与我们相聚三个月了。
3、“by＋时间”与祈使句连用，用于一般式。如：please
finish
the
task
by
the
end
of
the
month.请在月底前完成这项任务。be
here
by
this
time
tomorrow.明天这个时候要到这儿。
4、如强调某状态或动作在某时间为止还要继续下去，还可用完成进行式。如：by
the
time
you
graduate,i
shall
have
been
working
here
for
five
years.
到了你毕业时，我就在此地一直工作了五年之久
1、“by＋时间”与动作性强的动词连用时，主句多用于完成式。by后的时间可指现在、过去或将来时间点。
如：By the time he was fourteen year sold，he had learned maths all by himself. I shall have finished it by the time you come back.
By the end of the match, they had kicked two goals and we had kicked four.
They must have finished their work by this time.
但是，上述情况中当时间为将来时，主句动作发生在从句动作之后时，主句动词可用一般时态。如：If you're not better by then, I'll take you to see the doctor.如果到那时还不好些，我就带你去看病。
Can you finish this by tomorrow? 在明天以前你能做完这件事吗？
间或有用进行式的。如：By the end of the first week the head of the department was saying very nice things about me. 第一周末时系主任给我多多美言了几句。
2、“by+时间”与表状态的动词连用多用于一般式。by后时间可为现在、过去或将来时。如：By the end of the century the population numbered about four million. 到世纪末人口已经达到四百万左右。You can borrow my camera, but I must have it back by five o'clock.我的照像机你可以借去用，但是五点以前一定要还我。
By the time that the security guards had realized what was happening, the gang were already inside the bank. 等到保卫人员明白过来发生了什么事时，那一伙强盗已经进了银行。
He ought to be here by this time /by now.他此刻（现在）应该已经来到这里了。
如强调某状态在某时间前已经完成，也常用完成式。如：By next Sunday you will have stayed with us for three months.至下星期日为止，你将与我们相聚三个月了。
3、“by＋时间”与祈使句连用，用于一般式。如：Please finish the task by the end of the month.请在月底前完成这项任务。Be here by this time tomorrow.明天这个时候要到这儿。
4、如强调某状态或动作在某时间为止还要继续下去，还可用完成进行式。如：By the time you graduate,I shall have been working here for five years. 到了你毕业时，我就在此地一直工作了五年之久
“by＋时间”与动作性强的动词连用时，主句多用于完成式。by后的时间可指现在、过去或将来时间点。
如果后面的这个时间还没有到,就用一般将来时或将来完成时；
如果后面的这个时间已经过去了,就用过去完成时；
介词by在此的意思是：到……为止,在……之前；
for+ 段时间 常用于现在完成时中 谓语动词需为延续性动词；
举例
a、状态已完成：表示某事持续到将来某一时为止一直有的状态。并在将来完成。
b、动作已完成：表示将来某一时或另一个将来的动作之前，已经完成的动作或已经对动作产生一定的影响。
例：a：They will have been married for 20 years by then. 到那时他们俩结婚就满20年了。
b：You will have reached Shanghai by this time tomorrow. 明天的这个时候你就到上海了。
以上内容参考：百度百科-将来完成时
如果后面的这个时间还没有到,就用一般将来时或将来完成时；
如果后面的这个时间已经过去了,就用过去完成时；
介词by在此的意思是：到……为止,在……之前；
for+ 段时间 常用于现在完成时中 谓语动词需为延续性动词；
in+段时间 常用于将来时；
eg.He will return my book in two days.（两天内他将把书还给我）；
in those days 表示在那段时间里 可用一般现在、过去式；
eg.Last week I visited England.I had a good time in those days.
1、“by＋时间”与动作性强的动词连用时，主句多用于完成式。by后的时间可指现在、过去或将来时间点。
如：By the time he was fourteen year sold，he had learned maths all by himself. I shall have finished it by the time you come back.
By the end of the match, they had kicked two goals and we had kicked four.
They must have finished their work by this time.
但是，上述情况中当时间为将来时，主句动作发生在从句动作之后时，主句动词可用一般时态。如：If you're not better by then, I'll take you to see the doctor.如果到那时还不好些，我就带你去看病。
Can you finish this by tomorrow? 在明天以前你能做完这件事吗？
间或有用进行式的。如：By the end of the first week the head of the department was saying very nice things about me. 第一周末时系主任给我多多美言了几句。
2、“by+时间”与表状态的动词连用多用于一般式。by后时间可为现在、过去或将来时。如：By the end of the century the population numbered about four million. 到世纪末人口已经达到四百万左右。You can borrow my camera, but I must have it back by five o'clock.我的照像机你可以借去用，但是五点以前一定要还我。
By the time that the security guards had realized what was happening, the gang were already inside the bank. 等到保卫人员明白过来发生了什么事时，那一伙强盗已经进了银行。
He ought to be here by this time /by now.他此刻（现在）应该已经来到这里了。
如强调某状态在某时间前已经完成，也常用完成式。如：By next Sunday you will have stayed with us for three months.至下星期日为止，你将与我们相聚三个月了。
3、“by＋时间”与祈使句连用，用于一般式。如：Please finish the task by the end of the month.请在月底前完成这项任务。Be here by this time tomorrow.明天这个时候要到这儿。
4、如强调某状态或动作在某时间为止还要继续下去，还可用完成进行式。如：By the time you graduate,I shall have been working here for five years. 到了你毕业时，我就在此地一直工作了五年之久
分三种情况：
by +现在（常用现在完成时态）
by+过去用过去完成时态
by+将来常用一般将来完成时态
郟勤盐酸： 1、“by+时间”与动作性强的动词连用时,主句多用于完成式.by后的时间可指现在、过去或将来时间点. 如:By the time he was fourteen year sold,he had learned maths all by himself. I shall have finished it by the time you come back.By the ...
新河县14749342406： by + 时间点用于什么时态 - ？
郟勤盐酸：[答案] “by+时间”意为“不迟于”;“一到”;“当某时候到了”;“到…时为止”等.时间上有过去、 现在和将来之别.其时态可为一般式、完成式、进行式或完成进行式.
新河县14749342406： by+不同时间点句子的时态变化 - ？
郟勤盐酸：[答案] 表示时间,指“最迟在……之前”“到……的时候已经”,此时要注意它所连用的时态. 1、如果没有明显强调具体的影响结果,而是说一般的情况要用一般时态 He was very tired by the evening. 他到晚上已经很累了. 2、表示在.之前,不迟于 时 类似...
新河县14749342406： by + 时间点用于什么时态 - ？
郟勤盐酸： 如果是过去时间,用过去完成时,如果是将来时间,用一般将来时.
新河县14749342406： by加时间点的时态 - ？
郟勤盐酸：[答案] 如果加现在,就用现在完成时 加过去的时间点 用过去完成时 加将来的时间点 用将来完成时
新河县14749342406： by引导时间状语主句用什么时态 - ？
郟勤盐酸：[答案] 一般用完成时.如果by 与过去时间连用,则主句用过去完成时.如: We had finished learning five units by the end of last week. 如果by 与将来时间连用,则主句用将来完成时.如: We will have completed this bridge by the end of tis year. 希望我的回答对...
新河县14749342406： by加现在或过去的时间点,句中谓语分别用什么时态 - ？
郟勤盐酸：[答案] by经常是与完成时联系在一起,具体什么完成时取决于by之后的时间,例如by 2013是过去完成时,by now是现在完成时,by 2015是将来完成时
新河县14749342406： 当by+时间名词 的时候 时态应该是什么样的? - ？
郟勤盐酸： 一般时,完成时,都可以! 例句:The documents need to be ready by next Friday. I reckon the film should be over by 9.30. By the end of the day we had sold over 2,000 tickets. By the time we got home we were tired and hungry.
新河县14749342406： By+现在时间 by+过去时间 in the past few years in the last few years 各是什么时态? - ？
郟勤盐酸： by +过去时间 时态用过去完成时 by+将来时间 时态用将来完成时 in the past few years用现在完成时 有不会的可以再问我
新河县14749342406： by的用法,by后面加将来的时间,用什么时态? - ？
郟勤盐酸：[答案] 1)表示以一般的方法或方式.如: No one in those days could live by writing poems. (2)表示传达、传递的方式或煤介.如: How did you send the letter,by airmail or by ordinary mail? (3)表示用交通工具、通讯工具后接名词单数,不加冠词.如: He came...
