begoodatswim組成的英語句子

be good at swim 是擅長游泳的意思，組成句子可以從以下例子看出：

Our son had swim with swimming club for few years， he was a swimming coach for over 3 years he is good at swim. 我們的兒子在游泳俱樂部游泳了幾年，他當了3年多的游泳教練，擅長游泳。

She is good at swimming.她擅長游泳。

i am not good at swimming.我不擅長游泳。be good at 是擅長做什麼的意思 ，at後面可跟動名詞或者名詞，上句中swimming就是動名詞。

i am good at maths.我擅長數學。maths是名詞數學的意思。記住be good at的用法吧！