如果你很怕用英语，你可以说:

"I'm afraid of using Engpsh."

这是一个简单的句子，表达了你对使用英语的担心。

一些其他的句子，表达你对使用英语的担心的方式，包括:

"I'm nervous about speaking Engpsh."
"I get anxious when I have to use Engpsh."
"I'm worried that I'll make mistakes when I speak Engpsh."

这些句子都使用了动词"be afraid," "be nervous," "get anxious," 和 "be worried"来表达担心的感觉。

例如:

"I'm afraid of using Engpsh in front of a lot of people." (我很怕在很多人面前使用英语。)
"I get anxious when I have to give a presentation in Engpsh." (我在用英语做演讲时会感到焦虑。)
"I'm worried that I'll make a lot of mistakes when I speak Engpsh." (我担心我在说英语时会犯很多错误。)

希望这些信息对你有帮助!