Commands are also known as the imperative form. There is no difference if you give a command to a single person or to a goup of people - the form of the verb is the same. Put the verb in the infinitive form without "to" at the beginning of the sentence, you don't use a subject and end the sentence with an object.
|Tell someone to do something:|
|Put out the rubbish.|
|Take an umbrella with you.|
|Turn off the TV.|
Negative form: to make commands negative, put "don't" or "do not" before the verb.
|Tell someone not to do something:|
|Don't shout at me.|
|Don't open the window.|
|Do not stay out too late.|
Polite form: if you want to use the polite form, then add the word "please".
|Please don't shout at me.|
|Please tell me your phone number.|
|Hand out the books, please.|
|Help me with the homework, please.|
|Exercise 1||Exercise 2||Exercise 3|