Verb Valency & Argument Structure (Verbs 5.0): | English Grammar Made Simple
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https://www.youtube.com/watch?v=oZaQ1W6_ue8

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0:00 Welcome back, everyone! So far, we’ve talked about what verbs are, how they change form, how they mark time with tense and aspect,
0:08 and even how they express attitude or possibility with mood and modality. Today, we’re going to shift gears a bit and look at something more structural:
0:18 argument structure, also called valency. Here’s the big idea: just like atoms in chemistry have a certain number of bonds, verbs have a certain number of ‘slots’ for other words — these
0:31 slots are called arguments. These arguments are needed to make a sentence feel complete. Some verbs only need one argument, while others need two or even three. Understanding this helps
0:42 us see why sentences sometimes feel incomplete or awkward if the verb doesn’t get what it needs. The technical term for the number of arguments a verb requires is valency.
0:54 Arguments are the participants in the event described by the verb. Let’s take the verb kick as an example. From the meaning of ‘kick,’ we know there has to be someone doing the kicking
1:06 and something being kicked. That means kick has two valencies: the kicker, which is the subject, and the kickee, which is the object. Example: Charlie Brown kicked the ball.
1:18 In plain language: some verbs can stand alone with just a subject, while others need objects or complements to feel complete. If you don’t give the verb what
1:27 it needs, the sentence feels incomplete: She sleeps. complete (subject + verb) She reads. incomplete — reads what?
1:39 She reads books. now complete So, verbs can be classified based on how many arguments they require.
1:47 That brings us to intransitive, transitive, and ditransitive verbs. Intransitive verbs need only one argument, which is the subject. You should be familiar with how to
1:57 identify a subject, but I’ve also made them bold in these examples. Examples: She sleeps.
2:04 They arrived. The baby cried. Notice that these
2:08 sentences are complete with just the subject and the verb. There is no direct object required. Transitive verbs need two arguments: a subject and a direct object. I’ve made the subjects
2:21 bold just like before, and I’ve underlined the direct objects. If you’re not familiar with what a direct object is, The direct object is the entity receiving the action.
2:35 Examples: She reads books. They built a house.
2:44 He loves music. In each of these sentences, the direct object completes the meaning of the verb. Without it,
2:50 the sentence would feel unfinished. Ditransitive verbs are verbs that need three arguments: a subject,
2:57 a direct object, and an indirect object. Quick definition: the indirect object is usually the recipient of the direct object — the person or
3:10 entity who benefits from or receives the action. To make this easier to see, subjects are bolded, indirect objects are italicized, and direct objects are underlined.
3:24 Examples: She gave him a book. They sent their friend a letter.
3:29 He taught the students grammar. John gave Mary the book.
3:32 Now, notice the slightly different word order in this last example: John gave the book to Mary.
3:39 Here, the direct object comes first, followed by the indirect object introduced with “to.” This is just a different syntactic structure called the prepositional indirect object,
3:50 but the valency is still three. The verb still needs a subject, a direct object, and an indirect object — the ‘slots’ haven’t changed.
4:00 So, whether you say John gave Mary the book or John gave the book to Mary, the verb’s valency — three arguments — is the same. There’s another special type of verb:
4:10 copular verbs, which we first introduced about in our first video. These verbs link the subject to a complement instead of taking a direct object.
4:21 Examples: She is a teacher. The soup tastes delicious.
4:25 He became angry. Copular verbs take a noun or adjective as a complement: Adjective complement: You look tired.
4:39 Noun complement: Mary became a teacher. In simple terms, copular verbs create a link rather than performing an action on objects.
4:52 Here’s a quick way to remember valency: Intransitive = 1 slot (subject) Transitive = 2 slots (subject + direct object)
5:03 Ditransitive = 3 slots (subject + indirect + direct object) Copular = linking slot (subject + complement)
5:18 The number of arguments a verb takes determines the ‘shape’ of the sentence. And remember how each verb has its own rules. You can’t just swap verbs around
5:22 without breaking the sentence: She gave him a book. correct She gave. incomplete — it feels unfinished
5:31 She slept a sandwich. doesn’t make sense Verbs control the structure of the sentence. They decide what arguments are needed. Valency helps us understand sentence structure and why
5:42 sentences feel complete or incomplete. In our next video, we’ll move from valency to active and passive voice, seeing how arguments shift depending on the verb’s form.