The window suddenly opened of itself and an ugly dog came out.

那扇窗突然开了，一条极丑陋的狗跳了出来。

An old man walked into a pet shop one day with a large and very ugly dog.

有一天，一家宠物店里来了一位老先生，手里牵着一条大狗。

A man walked into a pet shop one day with a large and very ugly dog .

有一天，一家宠物店里来了一位老先生，手里牵者一条大狗。