他不擅长跑步英语:He is not good at jogging
解析:“be good at”意思是“擅长于……”,后面跟名词、代词或动词ing形式。be随着人称和时态的变化而变化,如:He is good at English.他擅长英语。
用法:be good后接不同的介词,表达的意思也不同。be good with意为“灵巧的;与……相处得好”。例如:She is good with her hands.她手很巧。
be good to意为“对……友好”。例如:My friend was good to me when i was ill.我生病时我的朋友对我关怀备至。
我不擅长说英语:I am not good at speaking English。或者:I don't do well in speaking English.be not good at = don't do well in (不擅长。。。)