I'm really angry with him!
我對他很生氣！
be angry with sb
對某人感到生氣
Are you angry with me for some reason?
你是因為某個原因生我的氣嗎？
be angry about sth
對某事感到生氣
I was very angry about the rumours.
我對這些謠言感到生氣。

A:Why are you so depressed,Tommy?
湯米，你的情緒好像很低落。怎么了？
B:Nothing.I'm just tired.
沒什么。我就是有點兒累。
A:Come on,Tommy.You can tell me!
別這樣，湯米。你有什么事情可以告訴我。
B:The boss gave me such a lot of work to do!I was working until 10 o'clock yesterday.And it has not been finished!
老板給了我特別多的活。昨天晚上我又工作到了十點。問題是，到現在還沒有做完。
A:Why don't you talk to your boss?
你為什么不和你老板談談呢？
B:I have talked to him.But he just said he couldn't find another person to help me.I'm really angry with him.
我跟他談了。可他說他找不到別人來幫我。我對他很生氣。
A:Tommy,just relax.I think your boss understands how hard you are working.
湯米，放輕松點。我相信你的老板知道你工作得多么辛苦。
B:I hope so.
但愿如此。