文章典型主体句式

【摘要】：一、原 因 结 果 例：There are probably+[many\several\three]+[resons\causes]+ for this+[dramatic\marked]+[increase\decline\change]+ in...二、比较 对 照 例：[There is no doubtthat\Obviously,]+ it has [its\both]+[drawbacks\disadvantages\negativeeffects]+[as well as\and]+[merits\advantages\positive effects]...三、例 证 例：We may +[cite\quote\mention\take\point out]+[a single\acommon\another]+ example of... 四、事 实例：No one can +[deny\doubt\ignor\overlook]+ the+[bare\hard\essential\profound]+ fact that...五、数 据 调 查例：A+[recent\new\nationwide]+[study\survey\poll\investigation]+[conducted\taken]+[ata factory\by officials]...六、权 威（专 家）例：As one+[scientist\writer\doctor\psychologist]+[wrote\commented\pointed out\noted],...七、分 析例：It seems+[quite\almost]+[likely\possible\credible\conceivable]+ that...