YOU SAID:

i will become the president of mcdonalds

INTO JAPANESE

私はmcdonaldsの社長になります

BACK INTO ENGLISH

I'm going to be the president of mcdonalds.

INTO JAPANESE

マクドナルドの社長になります

BACK INTO ENGLISH

I'm going to be the president of McDonald's.

INTO JAPANESE

私はマクドナルドの社長になるつもりです。

BACK INTO ENGLISH

I'm going to be the president of McDonald's.