Think this through very carefully before you write so that what you say shows a natural progressive from past experience to the job you are applying for.

【翻译】在你下笔之前要仔细考虑透彻，这样，你的所言就会显示出从以往经历到你申请工作这段时间，你是一位天生的进步者。

【结构分析】

Think this through very carefully （主句，本身为祈使句）before you write （时间状语从句）so that what you say shows a natural progressive from past experience to the job you are applying for.（目的状语从句）

1. think through (v.t + adv.) 考虑透彻

2. 在so that 从句中，what you say （主语）shows （谓语动词）a natural progressive （宾语）from past experience to the job you are applying for（定语从句修饰job）.（from... to...作定语，修饰progressive）