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。

youdao

Some students have a lot of difficulty (in) doing math problems.

一些学生做数学题有很大困难。

youdao

B have difficulty(in)doing sth.

“做……有困难”，固定用法。

youdao

Careful observation of the Hindu Kush-Himalayas region, an area where climate change could bring major impacts to people, have been relatively scanty, due to the difficulty of doing science in remote areas, compounded by political disagreements.

BBC: Climate research bolsters 'action' call to UN talks