1. If you are too rough on your computer it will break sooner than you think.2. Kids are usually rough on their toys.3. Don't be so rough with my iPad; you might break it!4. Little Johnny is rude to his classmates at the kindergarten.5. (Dogs barking at guests) Owner: Sorry about my dogs. Hope they were not rough on you.
 rough on something rough with something這是正統的美語說法.
1. 如果你對電腦太粗魯的話它很快就會壞掉.2. 小朋友通常對玩具很粗魯.
Being able to speak at the age of one, the boy has unlimited potentil when he grows up.