搞不清英语词性怎么连接。类似于adv+v/adv/adj这样的。答:on, by, at, under, behind, from, to, for, with, 介词为英语中的小词,但它们的作用可大着呢!7. numeral(num.)数词 eg. one, two, three, first, sencond, third 数词分为基数词和序数词两类8. conjunction(conj.)连词 eg. and, but, because, so, after, before,then, ...