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-creams
He (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 walked  ten kilometres.We have waled for three hours.You are walking) too fast. That’s why you are tired. I have been making) sausage rolls for the party all the morning.How many have you made)? ~ I have made (или просто made) 200.That boyhas eaten) seven ice-creamsHe hasn't stopped eating since he arrived. The driver has drunk). I think someone else ought to drive.I pulled up 100 dandelions.I have been pulling) up dandelions all day.