2)有些介词夹在名词之间构成成语:
day after day 日复一日地
year after year 年复一年
one after another 一个接一个地
one by one 一个接一个
little by little 一点一点地
side by side 并肩
step by step 一步步地
face to face 面对面
arm in arm 手挽手地
hand in hand 手牵手地
day to day 日常的
day by day 一天一天地
day before yesterday 前天
day after tomorrow 后天
heart to heart 互相交心的
3)还有一些成语包含两个介词:
from beginning to end 从头至尾
from bad to worse 越来越糟
from time to time 不时地
from head to foot 浑身
from morning to night 从早到晚
from start to finish 从头至尾
from door to door 挨门挨户地
from place to place 到各地
from generation to generation 一代一代地
from cover to cover (书面) 全部地,从头至尾
4)此外,“be+形容词+介词”也是一类成语:
be found of 喜欢
be full of 充满
be interested in 对…有兴趣
be keen on 热衷于
be confident in 对…有信心
be short of 缺乏
be sick of 厌恶
be proud of 对…感到骄傲
be loyal to 对…忠诚
be ashamed of 为…感到羞耻
be worried about 为…担心
be aware of 意识到
be busy with 忙于(某事)
be different from 和…不同
be famous for 因…而出名