Expressions of Quantity

An expression of quantity is a word or group of words that tells the amount of something. It answers the questions, “How much?” or “How many?”
Example
There are lots of things to do in a big company.
Expressions of quantity:
modify a noun.
describe the amount, or number, of something.
are used with count nouns or with non-count
nouns.
are used to express:
a positive idea:
“I read all the inbox messages.”
or
a negative idea:
“I read none of the inbox messages.”
SINGULAR VERB PLURAL VERB
Some of the book is good. Some of the books are good.

In most expressions of quantity, the verb is determined by the noun or pronoun that follows of.
SINGULAR VERB PLURAL VERB

Two-third of the pennies are mine. .Two-third of themoney is mine
A lot of the equipment
is new. . A lot of my friends are here

EXCEPTION: one of, each of, and every one of take singular verbs.
One of my friend is here.
Each of my friend is here.
Every one of my friend is here


1. The number of students in the class is fifteen.
2. A number of students were late for class.

The number is a subject in (1)
In (2): A number of =an expression of quantity = ‘a lot of’.
It is followed by a plural noun and a plural verb.

thanks mis shereen

[b]
thank you very very very much teacher