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.

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