YOU SAID:

I need to walk to the store and get some eggs.

INTO JAPANESE

店まで歩いて行って卵をもらわないと。

BACK INTO ENGLISH

I have to walk to the store and get some eggs.

INTO JAPANESE

私は店まで歩いて行かなければならず、卵を買ってきます。

BACK INTO ENGLISH

I have to walk to the store and buy eggs.

INTO JAPANESE

私は店まで歩いて卵を買わなければならない。

BACK INTO ENGLISH

I have to walk to the store and buy eggs.