Be good!/Be nice!/Be kind!

[dwni1]

Is it okay to use be before an adjective and an adjective followed by preposition?

For instance, I want to advise my friend to behave well.
Can I say to my friend
1 Be good!
2 Be nice!
3 Be kind!
4 Be considerate!
5 Be good to people!
6 Be nice to people!
7 Be considerate to people!
8 Be kind to people!

 

[emsr2d2]

Is it okay to use "be" before an adjective and before an adjective followed by a preposition?
For instance, I want to advise my friend to behave well. Can I say the following to my friend?

1. Be good!
2. Be nice!
3. Be kind!
4. Be considerate!
5. Be good to people!
6. Be nice to people!
7. Be considerate to people!
8. Be kind to people!

Note my corrections above.
All of your sentences are correct. When you tell someone to do something or be something, it's called an imperative. You might want to do some more study on that area of grammar.

 

[dwni1]

Does the use of imperative have anything to do with adjectives without prepositions and adjectives followed by prepositions?

 

[Tarheel]

Does the use of THE imperative have anything to do with adjectives without prepositions and adjectives followed by prepositions?

Probably not.

 

[Rabbi Hasan]

Is it okay to use be before an adjective and an adjective followed by preposition?

For instance, I want to advise my friend to behave well.
Can I say to my friend
1 Be good!
2 Be nice!
3 Be kind!
4 Be considerate!
5 Be good to people!
6 Be nice to people!
7 Be considerate to people!
8 Be kind to people!

Yes, it's perfectly okay to use "be" before an adjective and an adjective followed by a preposition. Your examples are spot on:

1. Be good!
2. Be nice!
3. Be kind!
4. Be considerate!
5. Be good to people!
6. Be nice to people!
7. Be considerate to people!
8. Be kind to people!

All these phrases make sense and are great ways to advise your friend to behave well.