have difficulty doing sth加不加s
have difficulty doing sth造句
have difficulty doing sth.
have difficulty doing sth定语从句
have difficulty doing sth造句简单
have difficulty doing sth翻译
havedifficultydoingsth例句
have difficulty doing sth
have difficulties doing用单数还是复数
have difficulty doing用单数还是复数
have difficulty with和in的区别
have difficulty to do还是doing
have been doing是什么时态
have difficulties in doing sth
have sb do和have sb doing区别
have fun to do还是doing
have trouble to do还是doing