1、concerntrate on:意思是集中精力于
①concentrate on sth
②concentrate on doing sth
③concentrate one's effort on sth/doing sth

2、focus on:集中做某事
focus your …… on sth.
focus one's ……on sth.

3、be/get absorbed in:be + adj.系表结构,意思是专心致志于某事
be/get absorbed in doing sth

4、pay one’s attention to:集中做某事,这里的to是介词
pay one’s attention to sth.
pay one’s attention to doing sth.

5、put one’s mind in:用心做某事
put one’s mind in sth.
put one’s mind in doing sth.

6、这几个短语的意思和用法都相差不大,需要注意的是词的其他搭配及用法不要搞混掉。
