-난 나의 고양이들이 바깥에서 놀게 했다. 

-그는 집에서 기다리고 있다. 

-난 아무 말도 하지 않았다.

-I let my cats play outside.✔

​=> Corrected : The sentence is corrected grammatically.

-He is waiting at home.✔​

=> Corrected : The sentence is corrected grammatically.

​

- I didn't say anything.✔​

​=> Corrected : The sentence is corrected grammatically.

Good job, Jiwon!​