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定冠词THE!分不清泛指类特指专指的特点啊

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定冠词THE!分不清泛指类特指专指的特点啊
麻烦细讲
Knowledge is power.为什么没有THE,是因为类指还是泛指的事物?
Tom owms a larger colletion of ()books than any other student in our class.为什么不用THE
The diet is measured in(为什么不用THE)calories,while the food is sold by (A) pound.后者属于固定搭配?售为一磅的意思?
If you buy more than ten ,they will knock 20 pence off THE price.为什么要用THE
Amy is always shy in (无THE) public and she never dares to make aspeech to THE public.我的答案正是反的!为什么前面无后有?
还有.定语从句的中心语通常是THE 什么什么,此处算什么指?为什么
泛指的四种形式:
a+[c]sl.(可数名词的单数形式) 强调每一个
the+[c]sl.
[c]pl
[u]
例子: A bike is a very useful transport tool.
The bike is a very useful transport tool.
Bikes are very useful transport tool.
Knowledge is power(knowledge是不可数名词)
都表示自行车(泛指概念)是一种有用的交通工具.
特指的两种形式:
the+[c]pl.(可数名词的复数形式)
the+[u](不可数名词)
另外 名词后面有介词短语(I like the view from the window)分词短语(The milk sold in the shop is not fresh)定语从句(The girl who lives next door is calld Rose),这些名词都是被特别修饰了的,表特指,应此应有the
(1)knowledge 在看到“a (good)knowledge of”的结构,有of必有a.其他情况下一般视为不可数名词,表泛指不用冠词.
(2)此处books 表泛指
(3)介词by表“以…计”,by the+[c]sl.:by the week/by the ton/by the yard/by the meter;by+抽象名词by volume/by weight/by length
例子:In America eggs are sold by the dozen.鸡蛋在美国是按打买的.
I'm paid by the month.我是按月计酬的.
= =我觉得应该是……while the food is sold by (the) pound食物是按磅卖的 是不是答案错了= =
(4)“这个价格”表特指
(5)in public是固定搭配
= =同学 拿一本语法书 仔仔细细认认真真安安心心读一遍记一遍 你的英语会有一个质的飞跃