例：
Could you go back to the beginning of the story?
你能不能回到故事的.开头？
Work on the new bridge is due to begin in September.
新桥定于九月份动工。
She's been working there since the beginning of last summer.
她自从去年夏初起就一直在那里工作。
She began to explain her plan of action to the group.
她开始向小组讲解她的行动计划。
At last things were beginning to look up.
情况终于开始好转了。
