The train arrives at 4 pm.

The train is going to arrive at 4 pm.

The earth is going to suffer a lot from CO2 emissions.

The earth will suffer a lot from CO2 emissions.

We'll send you an email.

We're going to send you an email.

I think everyone comes to the party on Saturday.

I think everyone is coming to the party on Saturday.

What are you going to do when you are finishing school?

What are you going to do when you finish school?

Wait! I'll drive you to the train station.

Wait! I'm going to drive you to the train station.

Oh, you're sick. I'm going to go to the pharmacy and get you some medicines.

Oh, you're sick. I'll go to the pharmacy and get you some medicines.

I think Jane won't (will not) speak to him after what he did.

I think Jane is not going to speak to him after what he did.

Let's go to the restaurant; we'll pay for you.

Let's go to the restaurant; we're going to pay for you.