Detective Haika

The word "imperative" is derived from the term "emperor". Emperors gave commands, and imperative sentences are commands. Imperative sentences consist of predicates that only contain verbs in infinitive form; verb phrases are not allowed. Imperative sentences are generally terminated with an exclamation mark instead of a period.
An imperative sentence gives a command. It usually end with a period, but it may also end with an exclamation point (!).
Commands ask or tell people to do something.
 is a command, that does not sound as commanding as,  But, both of these sentences are imperatives because they are both asking or telling someone to do something.

• Imperatives are used to issue commands. They use the infinitive of verbs (dropping the word 'to'); in the first person plural ('we'), the infinitive is preceded by 'let's' (or: 'let us'):

Speak!
Let's eat!
Close the door!

• The negative imperative is formed by placing 'don't' (or 'do not') before the imperative form; in the first person plural one uses 'let's not' (or 'let us not') :

Let's not forget who helped us.
Don't leave me!
Since commands are always speaking to someone or something (you've got to address them if you're going to ask them to do something), the subject is always the word you.
1. Use the imperative form

We use the imperative form to give orders, warnings and advice:

Be quiet!
Take care!
Listen to me carefully!

Because it can sound rude to give direct orders (especially if you are talking to an adult), we "soften" the imperative form with "let's" or "please":

Let's go now.
Please listen to what I'm saying.

2. Use a modal verb to turn the order into a request

We use modals to change the mood of a sentence. For example, "You should help her" is more polite than "Help her!"

Other modal verbs you can use to make requests are:

Could: Could you make me some tea?
Can: Can you come here please?
Will: Will you shut the door please?
Would: Would you wait here until the doctor is ready for you?

3. Use an introductory phrase to soften the order

Instead of using an imperative, you can use a phrase instead. Here are some common ways of phrasing an order, in order of the most indirect to the most direct:

Would you mind possibly… (+ ing) (Most indirect)
Would you mind possibly moving your car? It's parked right in front of mine.

I was hoping you could … (+ infinitive without to)
I was hoping you could spare me a few minutes this morning.


I'd like you to…
I'd like you to help me with the assignment.

I want you to…
I want you to stay with me.

4. Use sequencing words

You can use sequencing words to make instructions clear.

Firstly, make sure the appliance is disconnected.
Secondly, open the back with a screwdriver.
Then, carefully pull out the two black cables….