是keep study hard还是keep studying hard?

是keep study hard还是keep studying hard? learn hard还是study hard哪个对 need作为情态动词是怎么用?you need study hard还是you need to study hard? I wish you to study hard.是简单句还是复合句to study hard充当什么成分? 我在努力学习 是 I study hard还是I studying hard? keep hard study ,believe yourself ,one day you will success To study hard does good to your future.请问两个TO在这个句子中的用处是什么?To study hard是不定式还是To study? she is always study.还是she always study hard? Work hard at my study还是on my study? study hard at English,还是Engilsh very hard study hard you need study hard还是you need to study hard?need作为情态动词是怎么用?从语法角度讲，从考试角度讲 the students always __(study) hard是加ing 还是原型 这句话中是应该填and还是but?Study hard,__you'll pass the exam. He asked us to study hard 这个hard 可以与不定式看作整体吗 还是这句的宾语只是天to stidy hard是状语 she doesn't study hard ,其中hard是副词吗? 填量词 一什么白菜一ke 白菜 是哪个ke 颗 还是 study hard and you will learn English well一句中开头为什么不能是to study hard