该吃饭了: It's time for dinner. 不要等我吃饭了: Don't wait dinner for me. 我不耽误你吃饭了: I'll let you get back to your dinner. 他被人请去吃饭了:He's been asked out to dinner. 他已经习惯在外面吃饭了:He is used to eating out all the time. 孩子们大声吵着要吃饭了:The children were clamouring to be fed.