这个step 为什么不用复数形式?As he came forward,for all his step(就是这个) was firm and elastic,they could see that fatigue bore(bore这个词何解?查了词典但是觉得上面的解释不满意) heavily upon him.

这个step 为什么不用复数形式?As he came forward,for all his step(就是这个) was firm and elastic,they could see that fatigue bore(bore这个词何解?查了词典但是觉得上面的解释不满意) heavily upon him. 怎么解释这个英语句子?As for soccer player,Kaka is my favorite.这里soccer player 为什么不用复数形式,能这样单独放句子里吗? any city为什么不用复数形式 There are many fish in the river .这个句子中fish 为什么不用复数形式? centThe pay was 10 cent per envelope.为什么这个cent不用复数形式呢? 为什么underwear不用复数形式,而pants,trousers就要用? four-year-old为什么year不用复数形式 Ce sont des cahiers?为什么ce不用ces复数形式? favourite、abacus 复数形式My favourite are those shoes 为什么favourite不用复数？ she couldn't sleep for pain 为什么不用复数形式呢,而用单数pain 为什么不能用复数形式 谁知道以下单词复数形式和中文step-son step-mother step-brothersister-in-law parent-in-law 请问Our classroom is as large as theirs句中的theirs 为什么要用复数形式?请问句中的theirs为什么要用复数形式? A needs some cabbge,some apples and some grapes同样都是复数,为什么cabbage就不用变复数形式? 为什么在这句话中“Many families travel by car.”中“car”不用复数形式? Please give me some cake.cake 为可数名词为什么不用复数形式?some 的用法. last year my English class was difficult.此句的class为什么不用复数形式 That's a 15 dollar fine.这句话里dollar为什么不用复数形式dollars? They always go to school by bike.这里的bike为什么不用复数形式?