Freeguy
Senior Member
- Joined
- Oct 4, 2013
- Member Type
- English Teacher
- Native Language
- Persian
- Home Country
- Iran
- Current Location
- Iran
The students asked her professor if he would have gone on the space ship ....... earlier.
1. if he knew
2. if he knows
3. he had known
4. had he known
The answer key went for No.4. But I don't see any sign of inversion here.
Thanks
1. if he knew
2. if he knows
3. he had known
4. had he known
The answer key went for No.4. But I don't see any sign of inversion here.
Thanks