"friendly"的形容词比较级是"friendlier"，最高级是"friendliest"。以下是一些使用这两个形式的例句：
1. If you were friendlier, people would like you better.
2. She has been friendlier towards her coworkers.
3. He is friendlier than all other students in the class.
4. The new computer is much friendlier to use than my original.
5. Many fans came to watch this pre-season friendlies.