Englishfor English speakers
a
Determinative
—
A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
—
A is the first letter of the alphabet.
The letter "a" comes before "b".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
speech
Noun
—
When we have speech, we have the ability to speak.
Speech is a special human ability.
—
When we give a speech, we speak to a group of people.
He gave a speech to all of the students in his class.