She is collecting material for a book.
She's collecting material for a book.
He has an interest in collecting insects.
My hobby is collecting coins.
The boy gathered a handful of peanuts and put them in a small box.
I have not yet collected sufficient materials to write a book.
You must gather further information.
The police assembled a lot of evidence against him.
He collected bits of information.
Yoko is interested in collecting stamps.