A. buy sth for sb表示“买。。。给某人” I will buy a present for my daughter. buy sth with 表示“用。。。买”, I will buy a book with the money my father gives me. buy sth from 表示“从哪里买。。”, I often buy books from this bookshop. buy sth to 表示“买。。。来做。。。”,如:I will buy a paper but to decorate the wall.
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