This is (the way) how I became her boyfriend.
That is (the reason) why I fall in love with her.
I still remember the day when I met her.
This is the park where I met her.
This is what I wanted.
They are the people that want to buy our house.
I have a book which is about Japanese history.
He is the person whom I respect the most.
I know that girl whose name is Nancy.
I have a friend who is from U.S.A.
I'm invited to the party by Tom.
She stopped smoking.
I go to school to study English.
I bought a book to study English.
He stopped to drink coffee.
You're a musician, aren't you?
He is as tall as me.
He is the smartest of three.
I am younger than you.
He will be able to speak English soon.
You have to try this cake.
I would study every night.
I will do my best.
I should go home now.
Shall we dance?
You must finish this work in today.
I might go to Japan next month.
It may rain tonight.
Could I pay by credit card?
I could have lunch early today.