Is the following sentence linguistically acceptable?
People are said to do such crazy things at such high speeds there by Dorothy that I am getting skeptical.

acceptable

Is the following sentence linguistically acceptable?
Carol carved at the stone.

unacceptable

Is the following sentence linguistically acceptable?
Patrick to leave is likely.

unacceptable

Is the following sentence linguistically acceptable?
My nephew could write letters to his parents with a fountain pen with your help.
acceptable