What's The Difference? English Prepositions BY | FROM | OF · mmmEnglish
本视频讲解英语中三个常见介词by, from, of的用法区别，涵盖时间、地点、所属关系等场景。适合练习介词在不同语境下的正确使用。
Hey there I'm Emma from mmmEnglish!
嗨，大家好！我是 Emma，来自 mmmEnglish！
Today we're going to learn about three important prepositions in English grammar.
今天我们将学习英语语法中三个重要的介词。
You'll learn the difference between the preposition by, the preposition from and the preposition of.
你将学会介词 “by”、“from” 和 “of” 之间的区别。
And in English, they can be prepositions of time, they can be prepositions of place, of movement but actually
用英语来说，这些词既可以表示时间关系，也可以表示地点或运动关系。但实际上……
several languages have only one word for all three of these prepositions.
在某些语言中，这三个介词只有一个共同的词汇来表示它们的所有含义。
So it's really easy to see how by, from and of can be a little confusing when you try to use them in English.
因此，很容易理解为什么在英语中使用时，“by”、“from”和“of”这三个词会让人感到有些困惑。
But not anymore!
但现在情况不同了！
I'll show you when to use them and how to use each of these prepositions.
我会告诉你什么时候该使用这些介词，以及如何正确使用每一个介词。
Plus, there's a quiz at the end of this lesson to test what you know and make sure you're using these
此外，本课程的最后还有一个小测验，用于测试你的掌握程度，并确保你能够正确使用这些知识。
prepositions correctly in your English sentences.
在英语句子中，要正确使用介词。
Excuse my casual attire today, it is extremely hot.
请原谅我今天穿着随意——天气实在太热了。
Thirty-eight degrees.
温度是三十八度。
Not ideal for filming but let's give it a shot anyway.
虽然这个地方不太适合拍摄，但我们还是试试看吧。
Which of these prepositions is the most difficult for you to use?
在这些介词中，哪一个对你来说最难使用？
Let me know down in the comments.
请在评论区告诉我你的想法。
Let's start today's lesson by reviewing each of these prepositions individually.
让我们先分别复习一下这些介词，从而开始今天的课程。
After that, we'll take a look at some of the cases where all three of these prepositions are possible but the meaning
之后，我们会看看一些这样的情况：在这些情况下，这三个介词都可以使用，但它们的含义会有所不同。
or the way that it's used is slightly different.
或者，它的使用方式略有不同。
There are lots of different ways to use the preposition of in English.
在英语中，有很多不同的方式来使用介词“in”。
Today, we're going to look at the top four most common uses, starting with possession and belonging.
今天，我们将探讨四种最常见的用途，首先是从“占有”和“归属感”这两个方面开始。
So, we use of to show a relationship of possession or belonging between two nouns.
因此，我们使用 “of” 来表示两个名词之间的所属关系或占有关系。
Members of the club get free parking.
俱乐部会员可以免费停车。
Charles became the King of England.
查尔斯成为了英格兰国王。
And this is similar to the way that we use apostrophe S or the possessive S in English.
这与我们在英语中使用撇号 “’” 或所有格 “S” 的方式类似。
My friend's mother is Indonesian.
我朋友的母亲是印度尼西亚人。
So the apostrophe S shows that the mother belongs to the friend.
因此，这个带有撇号（’）的字母 “S” 表明这个母亲属于那位朋友。
We can use of to recreate this same sentence but keep the exact same meaning.
我们可以使用其他表达方式来重新构造这个句子，同时确保其含义完全不变。
The mother of my friend is Indonesian.
我朋友的母亲是印度尼西亚人。
So in this version, of indicates the relationship between the friend and the mother.
在这个版本中，符号表示朋友与母亲之间的关系。
This construction with of is very common in languages like German
这种使用“of”来连接词组的结构在德语等语言中非常常见。
but in English, it is much more common to use that possessive apostrophe S when we're talking about people
但在英语中，当我们谈论人时，使用表示所属关系的撇号 “S” 要常见得多。
and use of when we're talking about things.
当我们谈论某些事情时，会用到“when”这个词。
Sarah's house is down the road.
莎拉的家就在那条路的尽头。
Rather than: The house of Sarah is down the road.
正确的表达应该是：Sarah的房子就在那条路的尽头。
The colour of her hair was amazing.
她的头发颜色非常漂亮。
Rather than: Her hair's colour was amazing.
更好的表达方式是：她的头发颜色非常漂亮（或：她的头发颜色令人惊叹）。
We use of in quantifying expressions that describe a unit or an amount or a number of something.
我们使用“of”来量化那些描述某个单位、数量或数量级的表达式。
This is really common with uncountable nouns.
这种情况在不可数名词中非常常见。
When we need a way of measuring or counting an uncountable noun, we'll say something like: A cup of flour.
当我们需要一种方法来测量或计算不可数名词的数量时，我们会这样说：“一杯面粉。
A grain of sand.
一粒沙子。