We (walk) ten kilometres. We (walk) for three hours. You (walk) too fast. That's why you are tired. I (make) sausage rolls for the party all the morning. How many you (make) ? ~ I (make) 200. That boy (eat) seven ice-creamsHe (not stop) eating since he arrived. The driver (drink). I think someone else ought to drive. I (pull) up 100 dandelions. I (pull) up dandelions all day.

We have walked ten kilometres;

We have been walking for three hours;

You have been walking too fast. That's why you are tired;

I have been making sausage rolls for party all the morning;

How many have you made? I have made 200;

That boy has eaten seven ice-creams;

He has not stopped eating since he arrived;

The driver has been drinking. I think someone else ought to drive;

I have pulled up 100 dandelions;

I have been pulling up dandelions all day.