We can't say [I can do a perform.]Why not?10分!!!!

I can do : followed by a noun
Example: I can do it. ->You can do something.

If you want to have the meaning " I can do a perform", you can say in 2 ways:
1) I can perform. ...(something)
2) I can have a performance.

because perform is a verb not a noun. We could say'i can do a performace'