Melissas father was very busy, but he still played with her. ->No matter

`-` No matter how busy Melissa's father was, he still played with her. 

`->` No matter how + adj + S + tobe, S + V : Mặc dù, dù là

`->` QKĐ : S + were/was | S + Ved

`->` Dù bố của Melissa có bận đến đâu,  thì ông vẫn chơi với cô bé ấy