因为玛吉请了三天病假，所以她必须把落下的课补上。

　　[误] Since Maggie asked for a sick leave of three days,she should make up for her lost lessons.

　　[正] Since Maggie asked for a sick leave of three days,she should make up her lost lessons.

　　注：同样表示“弥补，补偿，补足”，make up 后面一般接具体的名词，如：make up a missed lesson(补课)

　　，a make-up examination(补考)等;而 make up for 后面的名词通常比较抽象，如：make up for the lost time(弥补时间上的损失)，make up for one\'s defects(补其所短)等。