These adjectives negative using prefixes il-; im-; ir-; in-. 1. you shouldn’t attend the wedding wearing clothes. formal 2. there is no doubt that cannabis will remain an drug for the foreseeable future. legal 3. it is for you to finish the project on time. possible 4. it would be of me to pretend enjoying going out with david. polite 5. my brother joseph can be at times. responsible