3单元语法精讲精练(2)

单元同步语法
unless, as soon as, so…that… 引导的状语从句
1.unless 引导的条件状语从句
Unless =〉if…not, 表示反面条件，意为“如果不、除非”。

eg:
They will go tomorrow unless it rains.
=〉They will go tomorrow if it doesn’t rain. 除非明天下雨，否则他们会去的。

I won’t let you in unless you show me your pass.
=〉I won’t let you in if you don’t show me your pass. 如果你不出示通行证，我就不让你进来。

注意：条件状语从句中的谓语动词一般要用现在时或过去时代替一般将来时或过去将来时。

2.as soon as 引导的时间状语从句
as soon as …意为“一……就……”，用来表示主从句的动作是紧接着发生的。

eg:
He will come and see you as soon as he can. 他一有空就来看你。

He rushed home as soon as he got the good news. 他一得到这个好消息就奔回家。

注意：as soon as 引导的时间状语从句在过去时态中主从句时态一致；若主句用一般将来时态，则从句用一般现在时态。

3.so…that…引导的结果状语从句
so…that意为“如此……以致……”，其引导的结果状语从句有如下四种结构：
（1）so+形容词/副词+that从句。

eg:
The village is so small that it cannot be shown in the map. 这村子太小，所以这地图上没有。

The wind was so strong that we could hardly move forward. 风刮得那么大，我们简直寸步难行。

（2）so+形容词+a/an+单数名词+that从句。

eg：
It was so hot a day that they all went swimming. 天是那么的热以致他们都去游泳了。

He made so inspiring a speech that everybody got excited. 他发表了如此鼓舞人的演讲以致大家都很激动。

（3）so+many/few+复数名词+that从句。

eg:
I have had so many falls that I am black and blue all over. 我摔了许多跤，以致于浑身青一块，紫一块。

He has so few friends that he often feels lonely. 他朋友很少，所以经常感到孤独。

（4）so+much/little+不可数名词+that从句。

eg:
I had so little money then that I couldn’t even afford a used car. 我当时囊中羞涩，甚至连一辆二手车都买不起。

He drank so much wine last night that he felt terrible. 昨晚他喝了那么多的酒，他觉得很不舒服。

单元同步语法强化训练
Ⅰ.用连词if, unless, as soon as 或so/such…that填空。

1.The animals were ______ lovely _______ I spent a whole day in the zoo.
2. _______it is cold tomorrow, he will stay at home and watch TV.
3.I sent some flowers to her _________ she finished speaking on the stage.
4.It was ________ an interesting story _________ everyone fell in love with it.
5.I won’t let you in ________ you get here on time.
6.He rushed home ___________ he got the good news.
7.You can’t get here on time _________ you get up earlier than before.
Ⅱ.同义句转换，每空一词。

8.The movie is so exciting that all of us want to see it again.
It is_____ ______ ______movie that all of us want to see it again.
9.He is too weak to carry the chair. He’s _____ _____ ______ he can’t carry the chair.
10.She will go to the party if she is free.
She won’t go to the party _______ she _______ free.
11.He finished his homework. He handed his homework in at once.
He handed his homework in _____ _____ ____ he finished it.
12.Zhang Lili was so brave that she saved her students. Zhang Lili was _______ _______ to save her students. Ⅲ.根据汉语意思完成句子，每空一词。

13.除非这个星期六下雨，否则我们就去公园。

We _____ ______to the park ______ it _______ this Saturday.
14.迈克总是一到家就打开电脑。

Mike always turns on the computer ______ _____ ______ he gets home.
15.这个房间如此大以致于能容纳20人。

This room is _______ big ________ it can hold 20 people.。