be good at ...表示擅长于...
后面接名词或者动名词(即动词ing形式)做宾语
例如:he's good at piano.
he's good at playing the piano.
be
good
at 的意思是:擅长...
在...方面做得好
,其同义短语
为
do
well
in
手工翻译,尊重劳动,欢迎提问,感谢采纳、给与好评!~
be good at 擅长于+doing
例:She is good at singing.
还有一个同义词组:do well in +do
She does well in sing.
擅长,善于,后接名词或动名词