下面三句话中with介词短语分别做什么成分啊?定语还是状语?为什么?

下面三句话中with介词短语分别做什么成分啊?定语还是状语?为什么?
1.With Italians it's pronunciation that's the problem.对意大利人来说,发音是个问题.
2.It's a very busy time with us at the moment.我们现在非常忙.
3.Richard,King of England from 1189 to 1199,with all his characteristic virtues and faults cast in a heroic mould,is one of the most fascinating medieval figures.