Prepositions Of, To and For

Of

1. Used for belonging to, relating to, or connected with:

examples

The secret of this game is that you can’t ever win.
The highlight of the show is at the end.
The first page of the book describes the author’s profile.
Don’t touch it. That’s the bag of my friend’s sister.
I always dreamed of being rich and famous.

2. Used to indicate reference:

examples

I got married in the summer of 2000.
This is a picture of my family.
I got a discount of 10 percent on the purchase.

3. Used to indicate an amount or number:

examples

I drank three cups of milk.
A large number of people gathered to protest.
I had only four hours of sleep during the last two days.
He got a perfect score of 5 on his writing assignment.

To

1. Used to indicate the place, person, or thing that someone or something moves toward, or the direction of something:

examples

I am heading to the entrance of the building.
The package was mailed to Mr. Kim yesterday.
All of us went to the movie theater.
Please send it back to me.

2. Used to indicate a limit or an ending point:

examples

The snow was piled up to the roof.
The stock prices rose up to 100 dollars.

3. Used to indicate relationship:

examples

This letter is very important to your admission.
My answer to your question is in this envelop.
Do not respond to every little thing in your life.

4. Used to indicate a time or a period:

examples

I work nine to six, Monday to Friday.
It is now 10 to five. (In other words, it is 4:50.)

For

1. Used to indicate the use of something:

examples

This place is for exhibitions and shows.
I baked a cake for your birthday.
I put a note on the door for privacy.
She has been studying hard for the final exam.

2. Used to mean because of:

examples

I am so happy for you.
We feel deeply sorry for your loss.
For this reason, I’ve decided to quit this job.

3. Used to indicate time or duration:

examples

He’s been famous for many decades.
I attended the university for one year only.
This is all I have for today.