It is my duty to keep my classroom clean and tidy it 是形式宾语还是形式主语

My duty is to my heart翻译 it is over duty to master it it is my duty 后加什么 it is our duty to do 连词成句 turn it to is duty on my today be It is my duty to keep my classroom clean and tidy it 是形式宾语还是形式主语 today is on my duty.thank you for you,i will try my best to do it啥意思 My duty is to my heart脑筋急转弯 英文翻译 He felt it his duty to.为什么不是He felt it is his duty to . It's my duty to save patients.的同义句 It's my duty to save patients.的同义句 it is our duty to distribute to the society翻译 I feel it my duty to help you with your English这句话里,I feel it my duty对吗?如果I feel it's my duty呢? My duty is for patient A caring B to care ① I think it my duty to do sth.和 i think it IS my duty to do sth.之间有什么区别?②第二句是复合句吗? it is our duty to protect the environment. It is our duty to protect the environment It is our duty to ＿（study） hard.