Karshi branch of tuit named after Muhammad al-Kharazmi practical work

Prohibition
This is similar to the examples above, except when you’re forbidding something you’ll usually use must:

• 
  They must not swim in the forbidden pool.
  
• 
  You mustn’t judge us too harshly. We’re doing the best we can.
  

Note: Mustn’t = must not.
Certainty
We’ve all been completely tired out after travel before. If you met someone who had just got home from a road trip, you might say:

• 
  You’ve been on the road all day. You must be exhausted.
  

Here, we use must to state something we think is true.

• 
  You must have heard of her, she’s the most popular actress in the world!
  
• 
  The dog is sick. He must have eaten too much grass.
  

Persuasion
In these cases, the thing you’re trying to persuade someone to do isn’t necessary—just something you really want to happen:

• 
  You simply must try the coconut shrimp. It’s sublime!
  
• 
  You have to visit us again before you leave town.
  

Review Exercise: Must, Have To, Need To

Download the review exercise for must, have to, and need to here.
When and How Do I Use Will and Would?
Will and would have various uses. Will can form the basic future tense, similar to shall. They are used in conditional if this happens, then that will happen statements.
Will and would can also make polite requests or statements, or talk about habits or things we usually do, or usually did in the past.
Predictions
If you want to say if something is or isn’t going to happen in the future, use will (or will not / won’t).

• 
  We will go to the lake on Saturday.
  
• 
  Only time will tell.
  
• 
  The gymnast will not be happy with that score from the judges.
  
• 
  I will teach you that next lesson.
  

Requests
In questions and statements with will and would, the asker is making sure that something is true or is not true.
In most cases, this is just a polite way of telling someone to do something, or saying that you are going to do something. For example:

• 
  Would you lock the door if you’re the last to leave?
  

Here, the speaker is telling the person to lock the door if they are the last to leave. It would also be correct to say Can you lock the door if you’re the last to leave?. Using would suggests that the answerer has a choice, making it feel less direct or bossy.

• 
  Next time, will you please ask me first before doing that?
  
• 
  I would like to make a toast to the bride and groom.
  

You can also use would or will to check if things would be true in certain circumstances. You’ll normally see if in these sentences:

• 
  Would you be angry if I took your last French fry?
  

In this sentence, the asker is asking if the specific action of taking the French fry would make someone angry. (If that someone was me, the answer would be Yes!)
Here are some more examples:

• 
  If you go to the store, will you buy me some chips?
  
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