楼主没有提供变化格式,就有很多种变化可能了!
He goes on doing his homework.
= He goes on with his homework.
= He continues doing his homework.
= He continues to do his homework.
= He continues (with) his homework.
= He carries on doing his homework.
= He carries on (with) his homework.
注：（ ）表示可以省略不用.