he watches TV twice a week 为什么 twice a week 放在句末?

he watches TV twice a week 为什么 twice a week 放在句末? he watches tv twice a week中文 My bother watches TV twice a week My brother watches TV twice a week 对twice 提问 he watches tv twice a week 知道twice a week 是固定搭配,那么用once time My brother watches TV twice a week 对twice a week 提问 Li Ming watches Tv once or twice a week Sarah watches TV twice a week.(对画线部分提问)(划线单词:twice) My bother watches TV twice a week.(对划线部分提问）划线部分是twice a week He watches TV twice a month提问 Twice times a week. Twice a week.