这种情况属于“短语介词”。由一个或几个简单介词、一个介词或几个其他词类组合构成的介词称为“短语介词”。短语介词在意义和作用上相当于一个简单介词。常用的有以下这些，请牢记于心：

by means of 通过，借助于

according to 根据 

along with 与……一起

at the back of 在……后面 

ahead of  在......前面，先于

as for 至于

as to 关于

at a speed of 以…的速度

at the age of 在…岁时

at the mercy of 完全受…支配，听命于

at the end of 在…结尾，结束时

at the speed of 以…速度

at the cost/expense of  以…为代价

at the risk of 冒…的危险

at the sight of 一看见…就

at the thought of   一想起…就

except for 除……以外 

apart from 除……以外还

in addition to 除……以外还

by way of 通过…方法；经由

for fear of 唯恐；以防

for the sake of 为了…起见；为了…的好处

for lack of 因缺乏；因没有

in accordance with 与…一致；按照，

in addition to 除…之外还

in case of 万一，以防，以备

in charge of 负责，主管

in connection with 关于…，与…有关

in comparison with 与…对比；对照

in favor of 支持；赞成

in exchange for 交换;调换

in need of 需要；急需

in search of 在寻找

in memory of 在记忆中

in honour of 为了荣誉

in respect of 关于

in view of 鉴于，鉴于

in relation to 有关，涉及

in return for回报；付给

in terms of 在..方面, 根据

in the course of 在…期间；在…的过程中

in the face of 面临

in the name of 以…名义

on top of  在…之上

with the help of 在…的帮助下

instead of 取代，而不是

in place of 代替    

in front of  在……前面

on top of  在……顶上

at the end of 在.....末尾

thanks to 幸亏；由于   

because of 因为    

owing to 因为

due to 因为   

on account of 由于

as a result of 由于……的原因

in spite of 尽管

regardless of 不管 

on behalf of 代表  

with regard to 关于

传说中的短语介词。。