英语题、关于 try to do 和 try doing

英语题、关于 try to do 和 try doing
Try ____(put) in some more sugar that might make it taste a bit better.
答案是 to put 、但是try to do 不是努力去做的意思么.在这里用符合题意吖、不应该是 putting 么、尝试去放一点糖.
麻烦解释一下.