他从学校回来时，他妈妈正在做饭的翻译：When he returned from school, his mother is cooking 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

When he came back from school, his mother was cooking

When he returned from school, his mother is cooking

He when comes back from the school, his mother is preparing food

When he came back from school, his mother is cooking

When he returned from school, his mother is cooking