YOU SAID:

What will become of me when I grow up?

INTO JAPANESE

私は大人になったら、私はどうなるのだろうか？

BACK INTO ENGLISH

When I became an adult, I wonder what happens?

INTO JAPANESE

私は大人になったとき、私はどうなるのだろうか？

BACK INTO ENGLISH

When I became an adult, I wonder what happens?