她通过剪下和收集优惠券开始学习优惠券使用技巧，以节省食品杂货开支。

She started learning ___couponing by clipping and collecting coupons to save money on groceries.

她每周花几个小时剪报和整理优惠券来节省开支。

She spends hours each week cutting out and organizing coupons for ___couponing to save money.

她每周都会花几个小时研究优惠券，把优惠券收集当成了一种爱好。

She spends hours every week studying ___couponing as a hobby.