Englishfor English speakers
after
Preposition
—
Later in time.
He came home after Jane did.
The doctor came after the patient had died.
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.
meal
Noun
—
The edible part of certain grains; it is often used to feed animals.