Helyesen fordítottam a mondatokat (4m)?

1. ha nincs előidejűség, hanem past simple? nem biztos

Although I didn't understand the exercise, I could do IT.

2. ha van előidejűség (és have to write múlt időben -> had to write)

I had been late so I had to write a test.

3. Before there was a ring, ...?

4. until helyett before?

He had very feared of flying before he flew for the first time in his life.

ahogy az #1. mondja, én még a másodikra is egyszerű jelent használnék:

I was late so I had to write a test.

Before the bell rang, he had already arrived.

(He had been very afraid of flying before flew for the first time in his life.)

1. ... do it.

2. ... I had to write...

3. Before they rang...

4. He had been very afraid of flying, before he flew at the first time.