可以的,没有问题Certainly i could 呢？是不是要有","应该是Certainly,i could?没有也也可以的你可以把Certainly 当做插入语----Could you lend me a hand to carry the box?----__________A.of course i canB.No,I can't C.Certainly i couldD.Yes i could你认为应该选什么？C.Certainly i could前面问句是Could ，回答也用Could可是这could不是谦辞吗？也要用could?看错了，应该是A可以说下原因吗？麻烦了提问者的语气看AC最合适表示同意的意思C要是换成Certainly i can 也对A的语气和语境正合适