Englishfor English speakers
in
Preposition
—
Used to show that something is inside something else.
The cat is in the box.
—
Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
—
Used to show movement towards the inside.
The rain came in through the window.
c
Noun
—
C is the third letter of the alphabet.
"b" comes before "c"
—
In some schools, an C is the passing grade.
Albert only just passed the exam; he got a C.