1.We should wash hands before meals.（主语可不同）
2.Watching TV too much is bad for our eyes.
(or)It is bad for our eyes to watch TV too much.
1.本图片的含义可以为我们应该饭前洗手，故本图片可写成We should wash hands before meals.（主语可不同）
2.本图片的含义可以为看电视太多有害健康，故本图片可写成Watching TV too much is bad for our eyes.(or)It is bad for our eyes to watch TV too much.