Imperatives

• by Cambrige University Press book 2011;
• by An English Grammar by W.M. BASKERVILL & J.W. SEWELL 1895;
• About me here;
• by Cambridge dictionary too;

Stay calm! Without worry, placeful ... Title is long but it's only one word. Hm... Man on the photo on the right side say "Stay calm!" too. I remember it, maybe it's important here more than anithing else.

Cause is earthquake that possible to be dangerous. Hmm ... only verb is common here, object is optional, but may be skipping. Subject place is empty ... 

No noun, pronoun ... no subject ... Verb isn't changeble ... object is optional. Hmm ... It's easy each time, because imperative exclude obligations and include only action as common.

Yes, earthqueake is not prevent now. But know what it's nature and know some how to be it it will come.

Common

• no personal obligations. Use please to be polite and take obligations;
• we know cause, it's nature affect;
  
• we know how it work, but isn't accurate;
• we know only verb without focuse on any group of them;

Yes, I think it's all that is common of the Imperatives. Also, verbs will coming in the next parth of the book. May be details of the verbs will help for understand Imperatives better.

It's infinitive here.

Always and never may used for say about previous experience.

Possible to be negative. It's for stop wrong activity that is possible, usually.

Subject is possble. But it add obligations, make it nearly of the present simple.

Do I need to make present simple as imperative? Yes, if nature affect is more understanding. Imperative may be transform into the present simple.

Scheme

• No time conditions: infinitive only;
  
• If have experience: use isn't accurate always or never;
  
• If know about famous action that isn't right but possible: use negative don't;
• If need to give obligation away: use please;
  
• If anybody can take obligation: use subject;
• Present simple will may be in the end;
  

It's right for nature affect where research didn't finish. Also, at some time where all conditions aren't clear but need to say or write anything. Is it needed?

Imperatives have a cause: palce, another event, action, statement, people, nature affect, etc.Cause is more common to  make or upgrade imperative to present simple.

Hmmm ... It's my opinion, I have finished present tense.

Stay calm!

Does it be right there?

Symbolic

I know about symbolic imperatives, example: "Danger!". No verb here, but it's equal to "Don't come near!". Maybe it's they are or not, but it's nearly.

How to

Listen to it if an alternative isn't possible. There isn't a complete answer here. Hidden cause is common. It may be present simple after justified upgrades. Use it too if I must.