实际上没区别,因为doing sth 是动名词, sth是名词,动名词和名词都是名词性质.意思一样,表达不一样而已.比如:he is good at studying english= he is good at english.

be good at doing是擅长于做某事的意思 be good at后面要接名词、动名词、代词或动词的ing形式,相当于do well in 例如:He is good at swimming. be good at作句子的谓语.he是主语,swimming是swim的现在分词形式,作宾语.

你好,意思是一样的. be good at sth 和 be good at doing sth 都表示擅长、善于(做)某些事物或事情. 比如:他擅长足球. 可以说: He is good at football. 或 He is good at playing football.

be not good at doing sth是正确的表达方法从句法上可以分析出这里的at是介词,后面要接动名词作为它的宾语.这个句子意思是不擅长做某事.比如:I am not good at speaking.-------我不善言谈

擅长于干某事

be good at doing sth = do well in doing sth 意思相同,没有区别.加油!不明白再问!如果帮到你,请采纳,谢谢!

be good at. 后面跟名词或者动名词.

1 He is good at playing tennis.他擅于打网球.2 I'm good at learning English .我擅长学习英语.3 A good listener must be good at asking questions.一个好的聆听者应该善于问问题.4 Be positive and proactive; be good at learning and thinking. 乐观

be good at doing sth

是be good at sth,不能再有doing了,因为已经有be动词了