was getting是什么时态

　　It was getting late when she finally showed up.

　　天色已晚，她终于赶到了。

　　The crisis was getting worse and worse.

　　危机越来越严重了。

　　It was getting worse by the minute.

　　情况急速恶化。

　　I'd been waiting for twenty minutes and I was getting impatient.

　　我等了二十分钟，有点不耐烦了。

　　She was getting more and more irritated at his comments.

　　她对他的评论越来越感到恼火。