combine with
与……结合/混合
例句：Water combines with carbon dioxide to form carbonic acid.
combine to do something
共同促成某事
例句：Their efforts combined to produce excellent results.
combine forces (with someone)
（与某人）联手、合力
例句：The two companies combined forces to develop a new product.
combine A and B
将A和B结合起来
例句：She combined her love of art and technology to create interactive installations.
combine into
融合成……
例句：Small streams combine into a large river.