英语翻译1、到我回家的时候,妈妈已经把饭做好了.2、到上个学期末,我们已经学了2000多个单词.3、当他们到电影院时,电

1. My mother had made the dinner ready when I arrived home.
2. By the end of last semester, we had learned more than 2000 words.
3. The movie had begun half an hour before when they arrived at the cinema.
4. The robber had run away when the police arrived.