When we want to speak in the past, we put –ed at the end of a verb. For example helped, wanted, started, prepared, opened. This grammar is called the past simple.
There are some verbs which have their special form for the past simple. There are only 53 of these verbs which you need for Level 2. The verbs are
ate, beat, became, bought, broke, built, came, cut, did, drank, fell, felt, flew, forgot, found, gave, got, grew, had, heard, hid, hit, knew, learnt, left, let, lost, made, met, paid, put, ran, read, said, sang, sat, saw, sent, shot, sold, spent, spoke, stood, swam, taught, thought, told, took, understood, went, woke up, won, wrote.
We use the past simple in about 11% of sentences in spoken English.
The first night, I slept on the sand. I thought that no people were around me. But then a little voice woke me up. I looked around. I saw a little man. This is the picture of the little man.
You can see more examples in the book The Little Prince.