什么是Changes

什么是Changes A mother's love never changes.为什么是changes 而不是changed. in the past few years there have been great changes in my city,为什么是have The rain __dirty as it falls through dirty air.为什么是becomes,不是changes save changes? changes是什么意思 for changes great changes Great changes shipping changes many changes have taken place in my hometown.为什么是主谓结构,谓语是have 还是 have taken place “There has been great changes in computers in the last few year”为什么是 has been不是have had Changes in Latitudes,Changes in Attitudes SAT 2 the equilibrium constant of a reaction changes as the concentration of the reactants changes.为什么是错的,反应物浓度不影响平衡吗?题干是醋酸的电离平衡.STATEMENT II解释是Changes in the concentrations of reactants and Great changes have taken place in Shanghai in the past 5 years.为什么是have taken place而不是have been taken place 不需要被动吗? Great changes ---- in my hometown in the past few years.A.took place B.have taken placeC.have been taken place D.were taken place为什么是B? The favorable changes in her appearance are often ____ through hairdressing.A,affected B,effected而我选的A,为什么是c啊,请解析, knouledge changes your