Q: Valid English sentence (grammatically) or not: Andy promised if we would go.
OPTIONS:
- unacceptable
- acceptable

A: unacceptable

Q: Valid English sentence (grammatically) or not: Who would you prefer for to win the race?
OPTIONS:
- unacceptable
- acceptable

A: unacceptable

Q: Valid English sentence (grammatically) or not: Mary is not running the marathon.
OPTIONS:
- unacceptable
- acceptable

A:
acceptable