助动词 没有助动词时就会用动词
you sister is here in less than an hour.现在时
you sister will be here in less than an hour .将来式
时态不一样will情态动词后要加动词或助动词
助动词 没有助动词时就会用动词
you sister is here in less than an hour.现在时
you sister will be here in less than an hour .将来式
时态不一样will情态动词后要加动词或助动词