I feel hard learning science this semester.为什么feel hard 后用了learning而不用learn,

I feel hard learning science this semester.为什么feel hard 后用了learning而不用learn, 句型转换 I have a hard time learning mathI have a hard time learning math.I ____ ____ learning math. I feel it useful ____(learn) english 填learning对吗 i fand learning hard to be learned.错在哪里 i fand learning hard to be learn I feel very___when I sit on a hard chair easy english简单i feel bored learning art or i feel bored to learn art?why 什么用法? i have a hard time learning english同义句i have（）time （）english 英语翻译Mama,thank you for so many years of my education and training,ignorance of the past,I always Jalan you angry,but now I grow up,self-reliance,and I feel that I should not be so naive,and her mother,I will work hard Learning,you will not li Mama,thank you for so many years of my education and training,ignorance of the past,I always Jalan you angry,but now I grow up,self-reliance,and I feel that I should not be so naive,and her mother,I will work hard Learning,you will not live up to my A:I feel that learning is very tired翻译中文是什么意思 I want to learning English for work hard.有没有语法错误? I you it a time came learning having hard until along was 连词成句 连词成句I ,you,English,a,time,helped ,learning,having,hard,until ,me,was i feel tired and i want to sleep you should work hard to improve your english When my little son was learning to walk,I often saw him______down.A.fell B.feel C.felt D.fall Learning English is ____for me because I can always find interesting ways to use English.A.funnyB.dufficultc.funD.hard i think to learn mor and work hard is the real way to successto learn 能不能换成learning? I feel sure that if I study hard,i will succeed 这句话语法错在哪里了?