Substructural
a. substructure的变形
🗣️ 情景例句
My son must have put you to a lot of trouble.
我儿子一定给你带来不少麻烦。
Think much, speak little, and write less.
勤思考，寡发言，少落笔。
When will the new people move into this house?
新住户什么时候搬进这所房子？