这英语句子有错误吗I had difficult finding the keyhole.有错误不?

做某事有困难有两种说法：
1. have difficulty doing sth. 其中的分词短语 doing sth. 用作时间状语,即“做某事的时候有困难”.
2. have difficulty in doing sth. 其中的介词短语 in doing sth. 用作方面状语,即“在做某事方面有困难”.
3. 还有一种说法是 have difficulty doing sth 是 have difficulty in doing sth. 省略了介词 in.相同的短语还有 have trouble (in) doing sth.（做某事有麻烦）.
因此,I had difficult finding the keyhole 是正确的.当然也可以说成 I had difficult in finding the keyhole.不过,前者更符合口语,后者有些学究味儿.

v.

有，have difficulty （in） doing sth.做某事有困难，正确的说法应该是I had difficulty (in) finding the keyhole.