I have a question about an explanation on the MGAMAT, "Sentence Correction"book, page 87.
That or whom CAN be dropped when the modified noun is the object of the modifying clause.
Wrong: The movie THAT we watched las Friday was scary.
Right: The movie we watched las Friday was scary.
My question: That or whom CAN or MUST be dropped when the modified noun is the object of the modifying clause?
1. If it CAN be dropped, why the last example is wrong?
2. If it MUST be dropped, why the following example (from the MGMAT "Sentence Correction"page 87) is right?
Right: The security guard WHOM we met was nice.
Thank you in advance.
Regards,
Patricia