英语begin是什么意思

　　I was beginning to think you'd never come.

　　我开始以为你是不会来了。

　　The pressure of work is beginning to get to him.

　　工作的'压力使他烦恼起来。

　　We began work on the project in May.

　　我们于五月份启动了这项工程。

　　Work has begun on the construction of the new airport.

　　新机场的修建已经开工。