英语I'm concerned about what to do,英语这句话为什么用i am,而不是用I concern

英语I'm concerned about what to do,英语这句话为什么用i am,而不是用I concern 语法填空：as far as i'——（concern）,...为什么要用am concerned 为什么是Do you want to know what I do?而不是what am do? 初二英语完形填空 I'm thinking about what I'm going to do 用as for as I am concerned .I plan to do…造两个句子 as far as i am concerned 和i concern Now I am thinking about what I need to do tomorrow.为什么加个abou I am going to do that I want to do 这句话that应该改成what为什么`` what I am supposed to do at school英语作文 英语：我想知道为什么what do you think i should do 而不是what do you think 初二英语完形填空,I'm thinking about what I'm going to do this summer I am very concerned about you!