1道初英语选择题2.______to get good grades.A.study hard B.studying h

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1道初英语选择题
2.______to get good grades.
A.study hard B.studying hard C.to study hard D.studied hard
我同学说答案是A,句子开头的那个动词时不应该要加ing 或者前面加to 为什么选A 请给我区别开这两种情况.

前面说的很对
祈使句可以用动词原形来开头
而这句话正是省略了you should的祈使句,you should后面是接动词原形的
你说的动词ing形式是做主语的
也就是动名词作主语的情况
比如Studying hard is a good way to get good grades
和你的这道题意思是一样的,但动名词作主语时谓语动词要用单数,但这里没有谓语动词,所以动名词的情况在这里是不成立的.

______to get good grades.Astudy hardB studying hard studying hard to get good grades一句中为何用studying而不是study ( )good grades,you should study hard.A Getting B Get C For g we have to study hard if we want to get good grades.对study h If I study hard .I will get good grades I am giong to study really hard,get a good grades.这句话对吗应该怎么 you can get good grades ＿＿hard A.to work B.in wo 连词成句 hard and will get grades you good study If you don't study hard,you won't get good grades. If you don't study hard,rather than you'll get good grades. you ____ study hard if you want to get good grades in englis grades,although,good,I,study,get,hard,don`t,I(?)连词成句