YOU SAID:

there are squirrels in my pants

INTO JAPANESE

私のズボンにはリスがいる

BACK INTO ENGLISH

There's a squirrel in my pants.

INTO JAPANESE

ズボンの中にリスがいます。

BACK INTO ENGLISH

There is a squirrel in my pants.

INTO JAPANESE

ズボンの中にリスが入っています。

BACK INTO ENGLISH

There is a squirrel in my pants.