Correct : 1) did you see my dog? he's run away . 2) mandy will buy a car as soon as she will pass her driving test .

1 Have you seen my dog? He is run away.

2 Mandy will buy a car as soon as she passes her driving test.

1) Have you see my dog? He has ran away.
2) Mandy will buy a car as soon as she pass her driving test.