complete the map of each site based on what you hear on the tape._英语解答

complete the map of each site based on what you hear on the tape.
为什么中间是based on,不是be based on?

人气：464 ℃　时间：2020-03-23 17:09:02

解答

注意谓语的个数,这里是祈使句已经存在谓语.怎么会再有一个be.如果变成be based on 的话后面的部分没法解释了.