We use the present simple to talk about actions we see as long term or permanent. It is a very common and very important tense.
Here, we are talking about regular actions or events.
They drive to the office every day.
She doesn’t come here very often.
The news usually starts at 6.00 every evening.
Do you usually have bacon and eggs for breakfast?
Here, we are talking about facts.
We have two children.
Water freezes at 0° C or 32° F.
What does this expression mean?
The Thames flows through London.
Here, we are talking about future facts, usually found in a timetable or a chart.
Christmas Day falls on a Monday this year.
The plane leaves at 5.00 tomorrow morning.
Ramadan doesn’t start for another 3 weeks.
Does the class begin at 10 or 11 this week?
Here, we are talking about our thoughts and feelings at the time of speaking. Although these feelings can be short-term, we use the present simple and not the present continuous.
They don’t ever agree with us.
I think you are right.
She doesn’t want you to do it.
Do you understand what I am trying to say.