instruction: Is the next sentence syntactically and semantically acceptable?

Smith loaned, and his widow later donated, a valuable collection of manuscripts to the library.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John can have danced.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Pat is eager to be examined by the dentist.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The harder it rains, how much faster a flow do you see in the river?

response:
acceptable