Current location - Training Enrollment Network - Books and materials - It is required to return the books I borrowed to the library before next Friday.
It is required to return the books I borrowed to the library before next Friday.
The books I borrowed should be returned to the library.

This is a shoulder missing in the middle. Should is followed by the verb prototype. Can you understand this explanation?

The books I borrowed must be returned to the library before next Friday.

The number I got from the library should (must, need) be returned to the library before next Friday.

Please adopt