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  • - [Voiceover] Hey grammarians,

  • let's talk about prepositional phrases:

  • what they are, and how they're used.

  • Their care and feeding, you know.

  • So a prepositional phrase, simply speaking,

  • is anything that follows a preposition, frankly.

  • So, if we look at the sentence:

  • Danielle blew the horn with the strength of a giant-

  • quick little doodle there.

  • There's Danielle blowing the horn

  • with the strength of a giant.

  • So this part with the strength

  • of a giant, is a prepositional phrase.

  • Actually, it's two prepositional phrases,

  • because there's with the strength,

  • and then, of a giant.

  • What is a prepositional phrase?

  • It is a word chunk that begins

  • with a preposition.

  • So, with is a preposition, of is a preposition,

  • and this entire thing, with the strength of a giant,

  • is one prepositional phrase, altogether,

  • composed of two smaller ones.

  • And what's cool, is you can use

  • prepositional phrases in a couple

  • of different ways.

  • You can use them as nouns.

  • You can use them as adverbs.

  • And you can use them as adjectives.

  • So we've got two different examples here,

  • just even within this first sentence here.

  • So Danielle blew the horn with the strength

  • of a giant. How did she blow the horn?

  • With the strength of a giant.

  • And so she blew the horn

  • with the strength of a giant.

  • So, with the strength of a giant,

  • this prepositional phrase is modifying

  • the verb blew.

  • You can really see, her hair's

  • being blown back just by the strength

  • of this (trumpet noise).

  • So this whole thing together is being treated

  • as an adverb, but if we look

  • at the word strength, strength

  • is being modified by of a giant.

  • So this is a noun, right, the word strength

  • is a noun, but this of a giant thing

  • is modifying it, so this part

  • is actually behaving as an adjective.

  • Kinda cool, right?

  • Let's look at some more examples.

  • To steal the queen's diamonds

  • would be a terrible crime.

  • This is actually something we'd call,

  • in addition to being a prepositional phrase,

  • this is something we'd call an infinitive.

  • The verb to steal, when it's presented like this,

  • in the to form never conjugates.

  • It's not affected by time, so it's

  • kind of infinitive and infinite.

  • But we are treating this whole thing

  • as a noun, right, because

  • to steal the queen's diamonds

  • is kind of all being considered one thing,

  • this big, old prepositional phrase,

  • would, right, to steal the queen's diamonds

  • would be a terrible crime.

  • So, this prepositional phrase is acting

  • like a noun.

  • Let's try another one.

  • I don't know what that is,

  • I just made it up.

  • Let's pay attention to how

  • the prepositional phrase of glass

  • works in the rest of the sentence.

  • You know, what part of this

  • is it attached to?

  • It's not I of glass, or enjoy of glass.

  • It's the cathedral of glass,

  • and that means that this of glass thing

  • is describing cathedral.

  • A cathedral is a place or a structure,

  • so it's a noun, right, so if of glass

  • is modifying this noun, that would make it

  • an adjective.

  • So of glass here, this prepositional phrase,

  • is behaving like an adjective.

  • Prepositional phrases can be really powerful

  • and really elegant, and really cool.

  • Like in Hamlet, in the "to be, or not to be"

  • speech, Hamlet describes death as

  • the undiscovered country, from whose bourn,

  • no traveler returns.

  • And bourn is an Early Modern English word

  • meaning, like, boundary.

  • What Hamlet is saying in the soliloquy

  • is that death is a mystery.

  • People don't come back from it.

  • And I think that's like a really powerful

  • use of a prepositional phrase.

  • All of this is describing country

  • in a way that undiscovered is also doing.

  • So country is being modified from both sides,

  • which is really cool, and it imbues

  • the word country with a really strange power.

  • But, you have to be careful

  • because you can set yourself up

  • for a lot of ambiguity

  • with prepositional phrases.

  • You may remember this terrible joke

  • from Mary Poppins. One man says,

  • "I knew a man with a wooden leg named Smith."

  • Other guy says, "But what was the name of his other leg?"

  • It's silly, but it's a good way to indicate

  • where confusion can arise

  • with prepositional phrases.

  • So I would say, generally, that the solution

  • to a problem like this is to just put

  • the named Smith part earlier in the sentence.

  • I knew a man named Smith who had a wooden leg.

  • Maybe lose the prepositional phrase.

  • That solves the problem.

  • What I'm trying to say is, prepositional phrases

  • are very powerful, but you have to be careful

  • about how you use them, because

  • if you're not careful, you can create

  • confusion or ambiguity.

  • Anyway, you can learn anything.

  • Sorry for the terrible cockney accent.

  • David out.

- [Voiceover] Hey grammarians,

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A2 初級 美國腔

介詞短語|語篇|文法|可汗學院 (Prepositional phrases | The parts of speech | Grammar | Khan Academy)

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    ben 發佈於 2021 年 01 月 14 日
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