amount
an amount of 十不可数名词 大量的……
a large/ great/small) amount of 十
不可数名词 大／少量的……
(large/ small) amounts of 十
不可数名词 大／少量的……
the amount of 十不可数名词...数的量／总额
当(large/ small) amounts of十
不可数名词用作主语时，其谓语用复数。
其他结构用单数。
A large amount of money was spent on the bridge.= Large amounts of money were spent on the bridge.
CF
supply sth. to sb. = supply sb. with sth.
供应某人某物
offer sb. sth. = offer sth. to sb.
给某人提供某物
provide sb. with sth. = provide sth. for sb .
给某人提供某物
1
1.The world is not only hungry ,
but also thirsty for water.
(1)not only … but also
应连接两个相对称的并列成分。
(2)not only … but also 连接两个名词作
主语时，谓语动词要根据 but also 后的名词
决定单、复数（就近原则）。
(3)not only … but also 连接两个句子时，not only 后面的句子要部分倒装
2
2.This may seem strange to you, since nearly 75% of the earth's surface is covered with water.
since 在本句中的意思是“因为；既然”引导原因状语从句。
解释为“自从……以来”，引导 时间状语。和现在完成时连用
解释为“因为”，引导原因状语从句，表示说话者和听者都知道的原因。
句型" It 's / It has been + 一段时间 + since 十时间状语从旬”中，译作“自从……以来，已经……（时间）了”。 从句的谓v . 用一般过去时 ，而且须是终止性动词。
3
3.However , as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall , is still enough for us.
this small amount of 意思是“这么少的”
which is constantly being replaced by rainfall 是非限制性定语从句修饰 fresh water.
is being replaced 是现在进行时的 被动结构
4
4.Only if we take steps to deal with problem now, can we avoid a severe worldwide water shortage.
句中can 放在we之前是因为if引导 状语位于句首 ，句子要采用部分倒转，就是把 be 动词，情态动词或助动词 放到主语之前。only 后的状语可以 是副词、介词短语、从句等。如果在 only 后作状语的是从句时，从句不要用倒装，要部分倒 装的是主句。
Only if the case is urgent should you call out the doctor in the middle of the night.
Only in this way can we learn English.
Only then did I understand what she meant.
Only when it rains do you feel cool.
5
4.Only if we take steps to deal with problem now, can we avoid a severe worldwide water shortage.
5.Compared with industry , agriculture is more likely to be affected by a limited water supply.
Compared with industry 是过去分词短语作状语，相当于 when agriculture is
compared with industry 。com pare与句子的主语 agriculture 之间是被动关系，因此用过去分词形式。
compare … wit h .. 把…… 和……比较（常表示同类相比，比较）
compare … to … 把……比作……（常表示异类相比，比喻）
The hear t is often compared to a pump.
Let 's compare this article with that one.
Three months has pass ed since he moved to this city.
Since this method doesn't work, let's try another.
It is / has been three months since he moved to this city.
Not only the students but also the teacher was against the plan.
Not only do they need clothing,
but they are also short of water.
He plays not only the piano
but also the violin .
