My friends asked me，“How do you come up with original ideas for birthday parties？”改为间接引语

应该是
My friends asked me how I came up with original ideas for birthday parties
注意的问题：1，时态一致， asked 和came一致，过去
2，语序，用陈述语序，所以要去掉助动词do

My friends asked me how i come up with original ideas for birthday parties.

My friends asked me How I came up with original ideas for birthday parties .

My friends asked me that how I came up with original ideas for birthday parties