Modifiers:a bit,really,etc.
1)of/bit/those/unfriendly/a/students/some/are
2)is/English/idea/books/a/really/reading/good
3)hard/incredibly/Chinese/to/it’s/learn

1)Some of those students are a bit unfriendly

2)Reading English books is a really good idea

3) It's incredibly hard to learn Chinese