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

Should I tell the driver to wait for us?

Here are some more examples:

• 
  Should I stay home with him if he’s sick?
  
• 
  What should Mariella do with the extra party food?
  
• 
  Who should I ask about the application?
  

Predictions
If you’re pretty certain about something but you still have some doubts, you can say that it should happen:

• 
  If we follow the instructions carefully, we should be able to build this bookcase properly.
  

In this example, you expect the instructions that come with your furniture to allow you to build it.
But as anyone who has tried to put together a flatpack bookcase knows, that isn’t always the case. Still, there should be a good end result.

• 
  The recipe should be easy enough to follow.
  
• 
  He shouldn’t be too hard to spot in a crowd. He’s very tall.
  

Advice
Here, we’re suggesting what the right thing is to do. Whether the person we’re talking to follows our advice or not is another matter:

• 
  You should do your research before making a big investment.
  
• 
  You ought to make a reservation soon.
  
• 
  You shouldn’t say things like that. It’s not polite!
  

Exercise: Shall, Should, Ought To

Download the review exercise for shall, should, and ought to here.
When and How Do I Use Must, Have To, and Need To?
We use the modal verb must to say if something is necessary or not, or persuade or forbid actions. Have to and need to work in the same way.
Necessity
Unlike should, with must, have to, and need to we are saying that the recommendation we’re giving isn’t optional.

• 
  You must be this tall to ride the rollercoaster.
  
• 
  Noel has to leave at 5pm.
  
• 
  I need to take a closer look at the problem.
  
• 
  My computer crashed. I had to redo all of my work!
  
• 
  She needed to speak to him, but she couldn’t find him anywhere.
  

Note: Unlike have to and need to, must doesn’t work in the past tense.
You can also use have to and need to to say when something isn’t necessary:

• 
  Modal verbs don’t have to be difficult. These simple rules can help!
  
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  It doesn’t have to make sense to us. It’s not our business.
  
• 
  Hans didn’t have to come back. He did it to save his friends.
  
• 
  You needn’t bother. I’ll take care of it myself.