I use the computer...
I use the computer to watch Youtube.
happy/hear
I am happy to hear about your sister.
I have a lot of homework...
I have a lot of homework to do.
I go to school...
I go to school to study science.
happy/see
I am happy to see my friends.
You have many books...
You have many books to read.
We went to Aeon...
We went to Aeon to buy clothes.
suprised/hear
I am surprised to hear about the new anime show.
There is so much food...
There's so much food to eat.
I went to the library to read books.
excited/go
I am excited to go to Canada.
We have many things...
We have many things to do today.
...have a good time.
I play video games to have a good time.
Yesterday/sad/hear
Yesterday, I was sad to hear about the test.
Hiroshima City is the...
Hiroshima City is the best place to visit.
Hiroshima City is the best place to see.
Hiroshima City is the best place to go.