为什么是Most families have bought family cars over the years不是have had才对吗

为什么是Most families have bought family cars over the years不是have had才对吗 为什么是most Americans而不是most of Americans? boring 的最高级为什么是 most boring? many的最高级为什么是most? Sublist 3 of Academic Word List - Most Frequent Words in Families(families most wolves protect their families if there is____(danger) 强酸强碱或者弱酸弱碱的判断1,测0.01mol /L HA溶液的PH,结论：PH=2 HA为强酸,PH大于2 HA为弱酸.为什么是这样?为什么以2为界限?2,测NaA溶液的PH,结论：PH=7 HA为强酸,PH大于7,HA为弱酸,同样请解释下,为 为什么是WHO IS the most BEAUTIFUL OF ALL early的最高级为什么是earliest,而不能加most? American English is a most important language.为什么是a不是the most important which one has ever impressed you most这句话中的most 为什么是放在最后 为什么是Computers are the second most useful invention of the world为什么是invention most of us are the only child in our families 句子分析语法,翻译 Most American families have vacation plans in summer vacation中plan为什么加s It’s very cold outside.Most of the families keep their windows _________.(close ) Most American families are smaller than those in other countries.的意思对了有奖赏哦! most families buy a christmas tree for their children的同义句 Most wolves protect their families if their is___ ___.怎么填