高一定语从句介词加关系代词用法我就想知道其中介词应该怎么选用.还有就是推荐一个好的背单词方法,我总是背了就忘.···

介词的使用看你的基本功了,介词一般根据意思来判断,如in表示“在...里”,但有的介词词义较多,还有固定搭配,需点滴积累.
定语从句中“介词+which”=where/when,在定语从句里作地点或时间状语,介词根据具体情况而变,其实是介词提前.例如：
Do you still remember the time?We worked on the farm at that time合成定语从句
Do you stiill remember the time when (=at which) we worked on the farm?.
when/at which代替了at that time
Yesterday I visited the park.We planted many trees and flowers in the park last year
.合成定语从句为
Yesterday I visited the park where/in which we planted many trees and flowers last year.
where/in which 代替了in the park
相信你能理解和赞同!祝你不断进步!