Student or Learner
1. Wine is made [from/ of ] grape.
2. Cheese is made [from/ of] milk.
3. Paper is made [from/ of] wood.
4. This desk is made [from/ of ] wood.
Regarding the choice between from and of, I learned the following "rules" back in high school.
・When the materal is transformed into something that looks totally different, from is placed before the material. (in the cases of #1-3)
・When the material still has its original quality, of is used. (#4)
Do yout think these "rules" are strictly observed? In my impression, the actual usage of made of and made from seems to be more flexible, and what I learned in school is more like just a tendency rather than rules.