cocoabread
To get good grades,Mary has to study harder.或者:In order to get good grades,Mary has to study harder.当然lz如果不想用逗号,可以这么改:Mary has to study harder to get good grades.to和in order to都表示为了...还有本句中"必须"不能用must,只能用have to do表示"必须"
annking168
为了取得好成绩并上一所好的大学他们应当把时间花在功课上In order to get good grades and go to a good university, they should spend time on their homework.
优质英语培训问答知识库