The imperative mood (often referred to simply as a command) is used to express demands,
instructions or requests.
We usually use the second person (plulral or singular) with an unspoken "you" for the subject.
When you're feeling bossy you can use the imperative.
For example:
You can also tell people not to do something.
For example:
This can all seem a bit rude really, so you can soften the command:
For example:
The exeption to the use of the second person is when you want to include yourself in your suggestion, here we use "Let's ....".
For example:
If you can't see the difference between saying to someone "Go to the pub", and "Let's go to the pub," you might never get to go to the pub yourself.
Let's stop now, I'm getting a headache