John had studied french before he went to Paris
When we arrived at the cinema, the film started
Richard had eaten all the cakes before Fred arrived home
When the gardener had finished digging, he put in some cabbage plants.
Думаю так. Там ведь можно использовать и простое? Но, на мой взгляд в 1, 3 и 4 нужно паст перфект, ведь там одно действие совершается перед другим.