Guide to English grammar

We're doing “Macbeth” in English.
Bob's working in Avon mouth at the moment. But they may be moving him to head office in Birmingham.

NOTE

1. 
   We use the present simple to talk about a permanent routine, whether or not the action is happening at the moment.
   

You're walking today. -Yes, I quite often walk to work.
You're walking today. You usually drive, don't you?

2. 
   We use the present continuous to say that we are regularly in the middle of something.
   

At seven we're usually having supper. (=At seven we're in the middle of supper.)
Compare the present simple for a complete action.
At seven we usually have supper. (= Seven is our usual time for supper.)
We can talk about two actions.
Whenever I see Graham, he's wearing a tracksuit.
I like to listen to music when I'm driving.

3. 
   We can also use the present simple to say what is the right way to do something.
   

You turn left at the church.
You put your money in here.

4 The present continuous with always

There is a special use of always with the continuous.
They're always giving parties, those people next door.
I'm always losing things. I can never find anything.
Mr. Adams is always quoting bits of Shakespeare.
In this pattern always means “very often” or “too often”.
Compare these sentences.
Our teacher always gives us a test. (= every lesson)
Our teacher is always giving us tests. (= very often)

5 An instant action

The present simple is also used to describe actions as they happen, for example in a commentary.
Hacker passes the ball to Short. Short moves inside, but Burley wins it back for United.
The speaker sees these actions as instant, happening in a moment. For actions over a period, we use the continuous.
United are playing really well now. The crowd are/is cheering them on.
We can also use the present (instead of the past) to tell a story. It makes the action seem more direct, as if happening now.