I've been slacking off on my English studies recently.
"私は最近英語の勉強ノルマをサボってしまいます"
- I've been slacking off on my English studies recently.
"quota" には数字が付きます。
- A quota of one diary entry per day.
- I have to meet a quota of 3 sentences a day.
英語で日記を毎日書く、センテンスを覚えるといったノルマを決めていますが、最近よくサボってしまいます。
- I decided that I would write a journal entry in English and memorize a sentence each day but I have been slacking off recently.
のほうが自然だと思います。