真确表述是:They had fun (in) swimming in the pool last week.
have fun (in) doing sth~喜欢做某事
其中in 可以省略,可以联想到spend some time (in) doing sth,in 可以省略
有问题,可以沟通,
真确表述是:They had fun (in) swimming in the pool last week.
have fun (in) doing sth~喜欢做某事
其中in 可以省略,可以联想到spend some time (in) doing sth,in 可以省略
有问题,可以沟通,