Englishfor English speakers
that
Determiner
—
Used to show which thing we are talking about; used with things that are not close to the speaker.
Give me that book, not this one.
Give me that, not this.
That dog is hungry.
that
Subordinator
—
used to link a subordinate clause to a main one
You said that you liked me.
Give me the book that I dropped.
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.
boy
Noun
—
A boy is a male child or teenager; someone who is not a man yet.
He had a pretty wife and two little ones: a boy and a girl.
My oldest son was a Boy Scout in England.
The boys basketball team won five games in a row.
Two teenage boys died in the crash.
A 12-year-old boy stands at the window and watches two men outside.
—
An immature man.
"I am a grown man" "you are not a man, you are a little boy, you don't act like a man".
—
A male animal.
I told my mom I wanted a boy puppy, not a girl one.