be good at
擅长做…
Th//www.souquanme.come soldier was good at playing fife.
这名士兵善于吹笛子。
I am good at freestyle and breast stroke.
我擅长自由泳搜趣网和蛙泳。

be good at意思：
v. 擅长; 健; 精通; 熟谙;
造句：
1，A teacher should be good at drawing inf搜趣网erences aboLbvWBhout other cases from one instance.
老师要善于举一反三。
2，You have to be good at spotting trouble on the way and head搜趣网ing it off.
你必须善于发现潜在的麻烦并加以化解。

I am good at playing football.我擅长踢足球。
Tony is good at singing English songs.托尼擅长唱英文歌
希望能帮助到到你！望采纳！谢谢！