I got tired of studying English, so I stopped once.
"英語の勉強に飽きてきたので、一度やめました"
- I got tired of studying English, so I stopped once.
- I lost interest in studying English and I stopped once.
英語に飽きたので、六か月前に一度DMMをやめ、また最近始めました。
- I got tired of English so I quit DMM six months ago and recently started again.