When I have difficulty in doing anything, I will ask my father for advice.
每当我做事遇到困难时，我往往向我父亲求教。
Some students have a lot of difficulty (in) doing math problems.
一些学生做数学题有很大困难。
B have difficulty(in)doing sth.
“做……有困难”，固定用法。
If you follow my advice, you will have no difficulty in doing these things.
你如果听从我的意见的话，你做这些事情是没有困难的。
I have too much difficulty in doing the work.
我做这项工作有太多的困难。
I have too much difficulty in doing the work.
我做这项工作有太多的困难。
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