Question

have difficulty什么时候用doing，什么时候用to do

Answer 1

doing

difficulty

英 ['dɪfɪkəlti]；美 ['dɪfɪkəlti] 　 　

n. 困难；争议；麻烦

1、difficulty引申还可作“困境(尤指经济上的拮据)”解，这时常用复数形式。

2、difficulty后常接“of+ n. / v -ing”或“in+ v -ing”作定语， in有时可省去，不用动词不定式。

相关如下：

difficulty in， in difficulty这两个短语的词序不同，意义和用法也完全不同。

1、difficulty in接动名词，意为“在…方面的困难”； in difficulty则是介词短语，在句中作表语或后置定语，意为“处于困境”“在困难中”。

2、另外， difficulty in中的difficulty只能用单数形式，而in difficulty中的difficulty多用单数，也可用复数，尤其是指“经济困难”时。

Answer 2

没有接to do 的、

习惯上说：
have difficulty (in) doing sth
=It is difficult (for sb) to do sth

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Answer 3

difficulty后常接“of+ n. / v -ing”或“in+ v -ing”作定语, in有时可省去,不用动词不定式。

difficulty of doing
Well, that disposes of the difficulty of choosing a holiday place.
好啦,那可解决了选择度假地点的难题了。

have difficulty in doing sth 有困难做某事
He experienced great difficulty in getting a visa to leave the country.
他申请出国签证经历了很大的困难。

Answer 4

have difficulty doing sth.