背上书包怎么说用英语

To say "carry a backpack" in Engpsh, you can say "wear a backpack" or "put on a backpack." You can also use the phrasal verb "pack on" or "strap on" to describe the action of carrying a backpack on your back. For example:

"I always wear a backpack when I go hiking."
"I packed on my backpack and headed out for the day."
"She strapped on her backpack and set off for school."

You can also simply say "carry a backpack" to describe the action of having a backpack with you and carrying it on your back. For example:

"I always carry a backpack when I travel, so I have all of my essentials with me."
"He carried a backpack full of books to class every day."