1.是are always busy.构成主系表构造。busily是副词,润饰动词或许是描述词。例句:We are always busy.我们老是很繁忙。He often Works busily.他老是很繁忙的任务。
2.busy 是描述词繁忙的。类似的另有kind clever hard_working helpful
3.Our teacher is strict.