To be: 이다
Let’s start building sentences in Korean. In this lesson, we will start by making simple sentences using the word 이다. The translation for “이다” is “to be.” English speakers often don’t realize how difficult the word “to be” is. Depending on who is being referred to, the word “to be” could be any of the underlined words below:
I am a man He is a man They are men I was a man They were men
In each of those sentences, a different word (is, am, are, was, were) is used depending on the subject and tense of the sentence. I can’t imagine how difficult this would be for an English learner. In Korean, the 이다 is used to represent all of those “to be” words.
As mentioned earlier, 이다 can be conjugated. In that way, 이다 is similar to verbs and adjectives, but the rules for 이다 are often (but not always) different. I will teach you how 이다 differs from verbs and adjectives as it becomes important in later lessons. For example, in Lesson 52 you will learn that the process for quoting a sentence with 이다 is different than with verbs and adjectives.
Like adjectives, 이다 can not act on an object. Only verbs can act on objects. For example:
I eat hamburgers (eat is a verb, the object is a hamburger) She meets my friend (meet is a verb, the object is my friend) They study Korean (study is a verb, the object is Korean) We listen to music (listen is a verb, the object is music)
All of those sentences (can) have objects because the verb is the predicate of the sentence. However, in sentences that are predicated by adjectives, there will not be an object
I am pretty She is beautiful They are hungry We are smart
Look at those four sentences. When we use adjectives in English, we must also use “to be” words like am, is and are. In other words, we cannot make sentences like this:
I pretty She beautiful They hungry We smart
Unlike in English, 이다 is not used in these types of sentences. That is, we do not use 이다 to indicate that something “is” an adjective. The structure of sentences predicated by adjectives is discussed in Lesson 3.
So, 이다 is not used in these types of sentences:
I am pretty She is beautiful They are hungry We are smart
However, 이다 is used in these types of sentences:
I am a man He is a man They are men I was a man They were men
이다 is used to indicate that a noun is a noun. The basic structure for a sentence predicated by “이다” is:
[noun은/는] [another noun][이다]
For example:
I는 man이다 = I am a man
Now substitute the words for “man” and “I,” which are:
나 = I 남자 = man