heisathome是什么结构

是主系表结构。Tell me whether he is at home.

告诉我他是否在家。

Ask if he is at home .问他在不在家。

She was in fact summoning up her resolution to meet her father if he were at home .她正在下定决心去和父亲见面，要是他在家的话。

Will he be at home at eight o clock this evening ?他今天晚上八点钟在不在家 

I don ' t know whether he is at home or at the office我不知道他是在家还是在办公室。