高一定语从句介词加关系代词用法

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!