Make third conditional sentence for each of the situations/begin with the words given below 1)she didnt have a car.she couldnt have driventhere (if she) 2)i didnt know she was the examiner/i made a silly joke)(had) 3)i didnt go downstairs.i was afraid of the dark(i might) 4)she was nervous.she made a mistake( 5)the other pupil laughed at me.i cried(if

Если можно использовать только третье условное, то так:

1) If she had had a car, she could have driven there.  

2) Had I known she was the examiner, I wouldn't have made a silly joke.

3) I might have gone upstairs if I hadn't been afraid of the dark.

4) If she hadn't been nervous, she wouldn't have made a mistake.

5) If the other pupil hadn't laughed at me, I wouldn't have cried.