is 后面的动词 一定要用 ing 看到这样一个句子,is后面的动词没用ing What you've got to do is turn around and say :" Watch me".

is 后面的动词 不一定要用 ing 形式,要具体情况具体分析的呢
当为be+to do 为将要做某事,或是祈使句
在此What you've got to do is turn around and say :" Watch me".为一句祈使句,口头用语呢
turn around and say 是前面what you've got to do