YOU SAID:

the red spy is in the base

INTO JAPANESE

赤いスパイが基地にいる

BACK INTO ENGLISH

There's a red spy on base.

INTO JAPANESE

基地に赤いスパイがいる。

BACK INTO ENGLISH

There is a red spy at the base.

INTO JAPANESE

基地には赤いスパイがいます。

BACK INTO ENGLISH

There are red spies at the base.

INTO JAPANESE

基地には赤いスパイがいます。

BACK INTO ENGLISH

There are red spies at the base.