高考英语知识点：since从句的用法

高考英语知识点：

since

从句的用法

1.

Since

从句为非延续性动词的过去时或现在完成时，时间的

起点应该从从句动作完成时刻算起。

例如：

Things have changed a lot since I wrote to you last time.

自我上次给你写信之后，情况已发生了很大的变化。

She has lived with us since she has come here.

自从她来到这里，就一直和我们住在一起。

2.

S ince

从句为延续性动词的一般过去时，表示动作或状

态的结 束。其含义与动词的词义恰好相反，具有否定意味。

例如：

All has changed since he was at home.

自从他离开家以后，这里的一切都变了。

I haven

’

t written to her since she lived in London.

自从离开伦敦以来，我还没有给她写过信。

He has never been to see me since I was ill.

自从我病愈以来，他一直没有来看我。

Two years have passed since I last smoked.

我戒烟已经两年了。

但如果

s ince

从句是延续性动词的现在完成时，则表示动作由开

始延 续至说话的时候，具有肯定意味。

例如：

He has never been to see me since I have been ill.

自从我生病以来，他一直没有来看我。

She has talked little since she has stayed at home.

自从她呆在家里以后，就很少讲话。

Since we have owned a car

，

we have gone camping every year.

自从我们有了汽车后，年年都去野营。

3.

在 现代英语中，

since

从句是延续性动词的一般过去时，

有时候也可以表示肯定意味。

此时，

多半用

ever

来加强

since

例如：

She has known me ever since she was a child.

她从小就认识我了。

I have live here ever since I was born.

我生下来就住在这里。

4.

在

it is+

时间

< br>+since

从句结构中，

since

< br>从句是非延续性

动词的一般过去时，含有肯定意味。

例如：

It is three years since her husband left her.

她丈夫离开她已经

3

年了。

It

is

over

sixty

years

since

the

People

’

s

Republic

of

China

was

established.

中华人民共和国已经成立

60

多年了。

5.

在

it is+

时间

< br>+since

从句结构中，

since

< br>从句是延续性动词的一