如果你不是很用功英语，你可以说：

"I don't put a lot of effort into studying Engpsh."

这句话的来源可能是你自己的看法或者是别人对你学习英语的观察。

其他一些表达方式包括：

"I'm not very dedicated to learning Engpsh."
"I don't put much effort into my Engpsh studies."
"I don't spend a lot of time practicing my Engpsh."

例句和翻译：

"I don't put a lot of effort into studying Engpsh."（我不是很用功学英语。）
"I'm not very dedicated to learning Engpsh."（我对学英语不是很专心。）
"I don't put much effort into my Engpsh studies."（我对英语学习不是很用功。）
"I don't spend a lot of time practicing my Engpsh."（我不是很花时间练习英语。）