Переведите предложение We write a test в Past simple, past continues, past perfect, past perfect continues

1. We wrote a test two days ago. - Past Simple.

Мы написали тест два дня назад.

2. We were writing a test when the headmistress came into the classroom. - Past Continuous.

Мы писали тест, когда директриса вошла в класс.

3. We had already written a test by 12 o'clock yesterday. - Past Perfect.

Мы уже написали тест к 12 часам вчера.

4. We had been writing a test for half an hour already when the bell rang. - Past Perfect Continuous.

Мы писали тест уже полчаса, когда раздался звонок.