他很擅长的英文

He is good at English and Maths.=He does well in English and Maths.be good at=do well in 擅长，善于

此句的关键在于“擅长”与“和” be good at ； be clever at ；do well in ；specializes in ；be capable of；be gifted at 都是擅长的意思，自己选择。之后是“和”可以用not only ……but also；and；as well as.自己组合一下吧！嘿嘿 比如：he is not only good at English but also Maths.