pretty follies应指撒娇胡闹，跟后面的that， 是这些prettyfollies使她赢得他的，

Naked of reticence是指devoid　of reticence, 不是赤裸的意思，和后面的shorn　ｏｆ 对应，　指她本该将她的little wicked ways （小小花招）spread like a chart (指一一坦率地给他看）。这虚拟语气一直管到这一行第一句完结。had you remained同 If you had remained, 所以又是一个新的虚拟句。前面部分表达她原本可以这样做，如果他留下来，原本是怎样，而其实她没有这样做，所以才有下面一段讲她留在他记忆中的是怎样的印象。 你应该重新仔细读一下这首诗。若要还原到正常语法写的话，前面一句应是：

I think I should have loved you presently, and [should have] given words in earnestthat I flung in jest ; and [should have] lifted honest eyes for you to see, and [should have] caught your hands against my cheek and breast; and [should have] flung aside all my pretty follies that won you to me, and [should have] spread my little wicked ways like a chart beneath your gaze, naked of reticence and shorn of pride.