【句子】

Snow aids farmers by keeping heart in the lower ground levels, thereby saving the seeds from freezing.
雪对农民是一种帮助,因为它保持地层土壤的温度,使种子不致冻死。

【解析】

的用法

1)用作名词

① 表示一般意义的“帮助”或“援助”,是不可数名词:

The family lived on government aid for two years.
这一家人靠政府援助生活了两年。

②表示“助手”或“辅助用品”等具体意义,是可数名词:

A dictionary is an important aid in learning a new language.
词典是学习一种新语言的重要工具。

③用于短语:

(a) come (go) to one’s aid 来(去)帮助某人:
They all came to my aid.
他们都来帮助我。

(b) in aid of 用来帮助...:
He collected money in aid of charity.
他为资助慈善事业募捐。

该短语通常用于 What’s ...in aid of?(...有什么用?)这样的结构:
What’s the money in aid of?
这钱作什么用?

(c) with the aid of 借助...的帮助:
We may travel with the aid of a good map.
我们可以靠一张好地图去旅行。

2)用作动词(及物)

They aided us with money.
他们用钱资助我们。

注意以下正误句型:

我们已帮助他们提前完成了工作。
正:We’ve aided him to finish the work ahead of time.
正:We’ve aided him in finishing the work ahead of time.
误:We’ve aided him finish the work ahead of time.

3)比较 aid 与 help:

①help 属普通用词,多用于口语和一般性文体;而 aid 则属正式用词,多用于较正式的文体。

②在表示较大的经济或物质帮助时一般用 aid, 较少用 help。

③两者句型有同有异:
正:help sb (to) do sth (to 可省略)
误:help sb doing sth

正:aid sb to do sth (to 不可省略)
正:aid sb in doing sth
误:aid sb do sth

常见短语

1)save for (v.+prep.)为…积蓄

It is necessary to save for when you are ill or too old to work.
有必要存些钱以备生病或年老不能工作时用。

2)save from (v.+prep.)从…中救出,使免受

The brave soldier saved a child from a burning house.
那勇敢的战士从着火的房子里救出了一个孩子。

3)save till (v.+prep.)把…保存到…

Let's save this bottle of wine till Christmas.
我们把这瓶酒留到圣诞节再喝吧。

4)ave up (v.+adv.)储存起来

I am saving up to buy a car.
我在攒钱买车。  

【练习】

We thought of selling this old furniture,but we've decided to _____ it. It might be valuable.(2002全国高考题)
A. hold on to   B. keep up with
C. turn to       D. look after

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