We’ll need(主谓） to buy a lot of things for our puppies（不定式短语作宾语）不定式短语分析to buy a lot of things for our puppies= to buy our puppies a lot of things 可见：to buy 是接双宾语的.语言点：...是指to buy a lot of things一起做宾语，还是分开来的？如to buy作宾语；a lot of things作宾语补足语。你把我弄晕了 ：）仔细看看我的解释。这里没有复合宾语，也就没有宾补