为什么用 some of us 而不是some of we

为什么用 some of us 而不是some of we some of us have a singing class.为什么用singing而不是sing? some of 中文意思是什么?I will meet some of Jean's friends 句子里为什么要用some of Jean's ,而不是some of Jean? We went to travel with some friends of _________ .us ours our ourselves 为什么答案选ours 而不是us Both of us like apples中为什么要用US而不是We there are some good important for all of us .此句中为什么用for 而不是to ,请问怎样才能恰当运用for和to.除了记住固定的词组以外. some of us it's time for some cake为什么cake而不是cakes some photos taken by the children of Yushu Qinghai 为什么用taken 而不是were taken what about some steak?问句为什么用some ,而不是any? what's the population of shanghai为什么用what's而不是there is We both like sports(改否定）____ of us ____ sports.neither后为什么用likes而不是like? 为什么shall we take some water with us用some In our class ,____has a dictionary.A.all of us B.each of us C.some of us D.every of us为什么选A不选B Some of us are tall. It's impolite to make noise while ____ noodles in some countries.为什么用eating而不是用to eat Some of people ,however,believe that an apartment own.这里的believe为什么可以用原形,而不是ing what's the price of yellow socks?为什么要用price而不是pair?