1. 最高级标志词形容词、副词最高级 most / chief / primary / main / leading / .....。

　　2. 唯一级标志词 only / unique / prefer / every / one / of all / perfect / .....。

　　3. 因果项标志词 cause / lead to / contribute to / thanks to / owing to / question / answer / why / reason / 其他形式的问句 / .....。

　　4. 转则项关键词 despite / in spite of / instead / while / from ~ to ~ / although ~ (yet)~ / not only ~ but also ~ / .....。

　　5. 序数项标志词所有的序数词(first , second)/ another / the other / next / last / in addition / on the other hand / .....。

　　6. 时间项标志词 when / how / today / as / before / after / since / then / until / .....。

　　7. 解释项标志词 or / namely / in other words / that is / that is to say / .....。

　　8. 目的项标志词 to / for / .....。

　　9. 总结项标志词 all in all / in brief / to conclude / at last / in summary / in short / .....。

　　10. 强调项标志词 副词：especially / particularly / almost / always / usually / ...... 动词：show / remember / note / notice / say / pronounce / .....。