英语高手进,用if,when 或unless将句子合并成一句.
the meeting continued till late at night.
while since until 各造一个句子
They were grinning and watching while one man laughed and poured beer over the head of another
当一个男人大笑着把啤酒倒在另一个人头上时,他们都在乐呵呵地看着。
Since I separated from my husband I have gone a long way.
自从我和我丈夫分开后,我的生活发生了很大的变化。
I tell you this, I will not rest until that day has come
我可以肯定地说,不到那天我不会休息。
until同since的区别?
until
till和until一般情况下两者可以互换,但是在强调句型中多用until.并且要注意的是:如果主句中的谓语动词是瞬时动词时,必须用否定形式;如果主句中的谓语动词是延续性动词时,用肯定或否定形式都可以,但表达的意思不同.例如:
I didn't go to bed until(till) my father came back.直到我父亲回来我才上床睡觉.
It was not until the meeting was over that he began to teach me English.直到散会之后他才开始教我英语.
I worked until he came back.我工作到他回来为止.
I didn't work until he came back.他回来我这才开始工作.
Please wait until I arrived.在我到达之前请等我.
since
ad.(常用于现在完成时或过去完成时)
1.此后;从那时到现在
She left school three years ago and has worked as a nurse ever
since.
她三年前毕业,从那时起便一直当护士.
2.之前,以前
prep.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
I haven't heard from him since last year.
我自去年以来未曾收到过他的信.
conj.
1.(常用于现在完成时或过去完成时)自...以来,从...至今
It's been ten years since they married.
他们结婚到现在已经十年了.
She has been living a hard life since her husband died.
她自从丈夫死后,一直过着艰苦的生活.
2.既然;因为,由于
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了.
Since it is so hot,let's go swimming.
既然天气这么热,我们去游泳吧.
He knocked a ticket when answering the phone.
When the train left i bought a ticket.
I ate breakfast when he came downstars.
The girl typed a letter when the boss arrived.
2.When She was looking around,she saw on one.
3.He cannot be here on time unless he gets up early.
4.Something dramatic will happen to us if we usually remember it better.
5.You will feel tired if you do not have enough sleep and rest.
6.He asked again when there was no reply
unless you work hard, you will fail the exam.
she saw someone when she looked around.
he cannot be here unless he gets up early.
when something dramatic happens to us, we remember it better.
you will feel tired is you do not have enough sleep and rest.
If there was no reply, he shouldask again.
If you don't work hard, you will fail the exam.
When she looked around, she saw no one.
He cannot be here on time unless he gets up early.
If something dramatic happens to us, we usually remember it better.
You will feel tired unless you have enough sleep and rest.
When he asked again, there was no reply.
1.if
it
is
fine
tomorrow.I
will
go
fishing
with
my
dad.
2.if
You
are
trying
to
memorize
something,you
should
focus
your
attention
on
the
most
importand
things
about
it.
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