我当然会唱英文歌用英文怎么说

"I can certainly sing Engpsh songs" in Engpsh is "I can certainly sing Engpsh songs"。
这句话的来源是你自己说出来的，表达了你有能力唱英文歌的意思。
例句：

I can certainly sing Engpsh songs, but I prefer to sing in Chinese.
I can certainly sing Engpsh songs, but I need to practice more before performing in front of an audience.

在上面两句中"I can certainly sing Engpsh songs" 都表示你有能力唱英文歌。