Today, I think about a Bound noun(dependent noun).
In korea, we have to used the bound noun.=In Korea, we have to use the bound noun.
For example, when we counted something there is a bound noun.=For example, when we count something there is a bound noun.
There is three pencel.=There are three pencils.
In this sentence, three is include unit.=In this sentence, three includes the  unit. But we have to speak 3 yeonpil(It is a pensel in korea) jaroo(This is a unit of the pencel) =But we have to say 3 yeonpil (It is a pencil in Korea) jaroo(This is a unit of the pencil.)
We used to a variety of unit that product has a matched.=We use variety of units that  can match the product.
So, I make a some sentence in my head, I think that how to count this product in English.=So, I make a some sentence in my head, I think that's how to count this product in English.

I watch the Spanish internet lecture in lunch time nowadays.
Sometimes, teacher gives an examples in English that I learn long time ago.=Sometimes, teacher gives an examples in English that I learned a long time ago.
I mean I studied grammer long time ago.=I mean I studied grammar a long time ago.

Before I told you that Grammer is not important in learning Langage.=Before I told you that Grammar is not important in learning a Language.
But My opinion is change a little bit.=But My opinion has changed a little bit.
Grammer is important, too.=Grammar is important too.

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I guess, that bound noun only exist in your country.

There's no such thing in English grammar.

Basic Rule. A singular subject (she, Bill, car) takes a singular verb (is, goes, shines), whereas a plural subject takes a plural verb.

Example: The list of items is/are on the desk.
If you know that list is the subject, then you will choose is for the verb.