before + n before + v-ing before + 句子 造句

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before+nbefore+v-ingbefore+句子造句before+nbefore+v-ingbefore+句子造句before+nbefore+v-ingbefore+句子造句I do my

before + n before + v-ing before + 句子 造句
before + n before + v-ing before + 句子 造句

before + n before + v-ing before + 句子 造句
I do my homework before supper.
I wash hands before having meals.
I watch TV before I do my homework.